{
  "title": "Organization of Data - Grade 9 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "What is the first step in organizing data?", "options": {"A": "Drawing graphs", "B": "Collection of data", "C": "Analysis", "D": "Presentation"}, "correct_answer": "B"},
    {"id": 2, "difficulty": "easy", "question": "Raw data is also called:", "options": {"A": "Organized data", "B": "Primary data", "C": "Secondary data", "D": "Grouped data"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Which is NOT a method of data organization?", "options": {"A": "Frequency distribution", "B": "Array", "C": "Random listing", "D": "Tally marks"}, "correct_answer": "C"},
    {"id": 4, "difficulty": "easy", "question": "Data arranged in ascending or descending order is called:", "options": {"A": "Array", "B": "Frequency table", "C": "Raw data", "D": "Grouped data"}, "correct_answer": "A"},
    {"id": 5, "difficulty": "easy", "question": "Tally marks are grouped in sets of:", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "C"},
    {"id": 6, "difficulty": "easy", "question": "Which helps in counting frequencies quickly?", "options": {"A": "Array", "B": "Tally marks", "C": "Graphs", "D": "Calculations"}, "correct_answer": "B"},
    {"id": 7, "difficulty": "easy", "question": "The difference between highest and lowest values is:", "options": {"A": "Mean", "B": "Range", "C": "Median", "D": "Mode"}, "correct_answer": "B"},
    {"id": 8, "difficulty": "easy", "question": "Data collected directly is called:", "options": {"A": "Secondary data", "B": "Primary data", "C": "Grouped data", "D": "Array data"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "Data collected from existing sources is:", "options": {"A": "Primary data", "B": "Secondary data", "C": "Raw data", "D": "Array data"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "Organizing data makes it:", "options": {"A": "More confusing", "B": "Easier to understand", "C": "Smaller", "D": "Larger"}, "correct_answer": "B"},
    {"id": 11, "difficulty": "easy", "question": "Which comes first: collection or organization?", "options": {"A": "Collection", "B": "Organization", "C": "Both together", "D": "Neither"}, "correct_answer": "A"},
    {"id": 12, "difficulty": "easy", "question": "Array arrangement helps find:", "options": {"A": "Range easily", "B": "Mean only", "C": "Graphs", "D": "Tally marks"}, "correct_answer": "A"},
    {"id": 13, "difficulty": "easy", "question": "Four vertical lines crossed by diagonal line represents:", "options": {"A": "4", "B": "5", "C": "6", "D": "7"}, "correct_answer": "B"},
    {"id": 14, "difficulty": "easy", "question": "The purpose of organization is to:", "options": {"A": "Hide data", "B": "Simplify analysis", "C": "Increase data", "D": "Make it colorful"}, "correct_answer": "B"},
    {"id": 15, "difficulty": "easy", "question": "Before creating frequency table, data should be:", "options": {"A": "Collected", "B": "Graphed", "C": "Analyzed", "D": "Published"}, "correct_answer": "A"},
    {"id": 16, "difficulty": "easy", "question": "Data can be organized in:", "options": {"A": "Tables only", "B": "Graphs only", "C": "Both tables and graphs", "D": "Neither"}, "correct_answer": "C"},
    {"id": 17, "difficulty": "easy", "question": "Which is a tabular method?", "options": {"A": "Frequency distribution", "B": "Pie chart", "C": "Bar graph", "D": "Line graph"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Well-organized data helps in:", "options": {"A": "Better decisions", "B": "More confusion", "C": "Data loss", "D": "Longer reports"}, "correct_answer": "A"},
    {"id": 19, "difficulty": "easy", "question": "Range = ?", "options": {"A": "Highest - Lowest", "B": "Lowest - Highest", "C": "Highest + Lowest", "D": "Highest ÷ Lowest"}, "correct_answer": "A"},
    {"id": 20, "difficulty": "easy", "question": "Data: 5,3,8,1,6. After arranging in ascending order:", "options": {"A": "1,3,5,6,8", "B": "8,6,5,3,1", "C": "5,3,8,1,6", "D": "1,5,3,6,8"}, "correct_answer": "A"},
    
    {"id": 21, "difficulty": "medium", "question": "Arrange in ascending order: 12,5,18,3,9,15,7", "options": {"A": "3,5,7,9,12,15,18", "B": "18,15,12,9,7,5,3", "C": "5,3,7,9,12,15,18", "D": "3,5,9,7,12,15,18"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Find range of: 25,18,32,15,40,22", "options": {"A": "15", "B": "20", "C": "25", "D": "30"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "Data: 4,7,4,9,7,4,6,7,9. Create frequency table. Frequency of 7?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "Make array of: 15,8,22,15,10,18,8,22,15,10", "options": {"A": "8,8,10,10,15,15,15,18,22,22", "B": "22,22,18,15,15,15,10,10,8,8", "C": "8,10,15,18,22,8,10,15,15,22", "D": "15,8,22,15,10,18,8,22,15,10"}, "correct_answer": "A"},
    {"id": 25, "difficulty": "medium", "question": "Using tally marks, represent frequency of 8 for value 'A':", "options": {"A": "||||", "B": "|||| |", "C": "|||| ||", "D": "|||| |||"}, "correct_answer": "C"},
    {"id": 26, "difficulty": "medium", "question": "Data: Red,Blue,Red,Green,Blue,Red,Green,Red. Frequency of Red?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 27, "difficulty": "medium", "question": "Marks: 35,42,50,35,48,42,35,50,48,35. Which mark has highest frequency?", "options": {"A": "35", "B": "42", "C": "48", "D": "50"}, "correct_answer": "A"},
    {"id": 28, "difficulty": "medium", "question": "Find range: 120,85,150,95,110,135", "options": {"A": "50", "B": "55", "C": "60", "D": "65"}, "correct_answer": "D"},
    {"id": 29, "difficulty": "medium", "question": "Organize: Apple,Orange,Apple,Banana,Orange,Apple,Banana,Apple. Frequency of Apple?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 30, "difficulty": "medium", "question": "Data: 12.5,15.3,12.5,18.2,15.3,12.5,20.1. Frequency of 12.5?", "options": {"A": "1", "B": "2", "C": "3", "D": "4"}, "correct_answer": "C"},
    {"id": 31, "difficulty": "medium", "question": "Arrange descending: 45,32,58,41,37,52,48", "options": {"A": "58,52,48,45,41,37,32", "B": "32,37,41,45,48,52,58", "C": "45,32,58,41,37,52,48", "D": "58,45,52,32,48,41,37"}, "correct_answer": "A"},
    {"id": 32, "difficulty": "medium", "question": "Heights: 150,155,160,155,165,160,155,170. Range?", "options": {"A": "15", "B": "20", "C": "25", "D": "30"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "Create frequency distribution for: 1,3,2,1,4,3,2,1,4,1", "options": {"A": "1:4,2:2,3:2,4:2", "B": "1:3,2:3,3:2,4:2", "C": "1:4,2:2,3:2,4:1", "D": "1:4,2:1,3:2,4:3"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "Which shows data organization? A) Raw numbers B) Frequency table C) Random list D) Unordered data", "options": {"A": "A", "B": "B", "C": "C", "D": "D"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "Temperatures: 25,28,30,25,32,28,25,30. Make array.", "options": {"A": "25,25,25,28,28,30,30,32", "B": "32,30,30,28,28,25,25,25", "C": "25,28,30,25,32,28,25,30", "D": "25,25,28,25,30,28,32,30"}, "correct_answer": "A"},
    {"id": 36, "difficulty": "medium", "question": "Data: A,B,C,A,B,A,D,A,B,C. Frequency of B?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Range of: 0.5,1.2,0.8,1.5,0.9,1.8", "options": {"A": "1.0", "B": "1.1", "C": "1.2", "D": "1.3"}, "correct_answer": "D"},
    {"id": 38, "difficulty": "medium", "question": "Weights: 45,52,48,45,55,52,48,45. Which weight appears 3 times?", "options": {"A": "45", "B": "48", "C": "52", "D": "55"}, "correct_answer": "A"},
    {"id": 39, "difficulty": "medium", "question": "Scores: 75,80,85,90,75,85,80,75,90,85. Frequency of 85?", "options": {"A": "1", "B": "2", "C": "3", "D": "4"}, "correct_answer": "C"},
    {"id": 40, "difficulty": "medium", "question": "Arrange ascending: 22,15,30,18,25,12,28", "options": {"A": "12,15,18,22,25,28,30", "B": "30,28,25,22,18,15,12", "C": "15,12,18,22,25,28,30", "D": "22,15,30,18,25,12,28"}, "correct_answer": "A"},
    {"id": 41, "difficulty": "medium", "question": "Data: 100,150,120,130,150,100,140,120. Range?", "options": {"A": "40", "B": "50", "C": "60", "D": "70"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "Colors: Red,Blue,Green,Red,Blue,Red,Green,Red,Blue. Frequency table correct?", "options": {"A": "Red:3,Blue:3,Green:2", "B": "Red:4,Blue:3,Green:2", "C": "Red:4,Blue:2,Green:3", "D": "Red:3,Blue:2,Green:4"}, "correct_answer": "B"},
    {"id": 43, "difficulty": "medium", "question": "Ages: 14,16,15,14,17,16,15,14,18. Array formation:", "options": {"A": "14,14,14,15,15,16,16,17,18", "B": "18,17,16,16,15,15,14,14,14", "C": "14,16,15,14,17,16,15,14,18", "D": "14,15,14,16,17,14,16,15,18"}, "correct_answer": "A"},
    {"id": 44, "difficulty": "medium", "question": "Find range: 8.5,9.2,7.8,10.1,8.9,9.7", "options": {"A": "2.1", "B": "2.2", "C": "2.3", "D": "2.4"}, "correct_answer": "C"},
    {"id": 45, "difficulty": "medium", "question": "Data: X,Y,Z,X,Y,X,W,X,Y. Frequency of X?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 46, "difficulty": "medium", "question": "Marks: 55,60,65,70,55,65,60,55,70,65. Which has frequency 2?", "options": {"A": "55", "B": "60", "C": "65", "D": "70"}, "correct_answer": "D"},
    {"id": 47, "difficulty": "medium", "question": "Arrange descending: 3.2,4.5,2.8,5.1,3.9,4.2", "options": {"A": "5.1,4.5,4.2,3.9,3.2,2.8", "B": "2.8,3.2,3.9,4.2,4.5,5.1", "C": "5.1,4.2,4.5,3.9,3.2,2.8", "D": "3.2,4.5,2.8,5.1,3.9,4.2"}, "correct_answer": "A"},
    {"id": 48, "difficulty": "medium", "question": "Range of: 200,250,180,220,270,190", "options": {"A": "70", "B": "80", "C": "90", "D": "100"}, "correct_answer": "C"},
    {"id": 49, "difficulty": "medium", "question": "Data: 1,1,2,3,2,1,3,2,1,4. Create tally representation.", "options": {"A": "1:||||,2:|||,3:||,4:|", "B": "1:||||,2:||,3:||,4:|", "C": "1:||||,2:|||,3:||,4:||", "D": "1:|||,2:|||,3:||,4:|"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "medium", "question": "Which needs organization? A) 2,5,3,7,2 B) Frequency table C) Array D) Both B and C", "options": {"A": "A", "B": "B", "C": "C", "D": "D"}, "correct_answer": "A"},
    {"id": 51, "difficulty": "medium", "question": "Heights: 160,165,170,165,175,170,165. Range?", "options": {"A": "10", "B": "15", "C": "20", "D": "25"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "Data: A,B,A,C,B,A,D,A,B,C,A. Frequency of A?", "options": {"A": "4", "B": "5", "C": "6", "D": "7"}, "correct_answer": "B"},
    {"id": 53, "difficulty": "medium", "question": "Arrange ascending: 45,30,55,40,35,50,48", "options": {"A": "30,35,40,45,48,50,55", "B": "55,50,48,45,40,35,30", "C": "45,30,55,40,35,50,48", "D": "30,45,35,40,55,48,50"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "medium", "question": "Temperatures: 20,22,25,22,28,25,22,30. Most frequent?", "options": {"A": "20", "B": "22", "C": "25", "D": "28"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "medium", "question": "Range of: 12.5,15.8,10.2,18.3,14.7", "options": {"A": "7.8", "B": "8.0", "C": "8.1", "D": "8.2"}, "correct_answer": "C"},
    {"id": 56, "difficulty": "medium", "question": "Data: 7,5,9,7,6,5,8,7,6,5. Frequency table?", "options": {"A": "5:3,6:2,7:3,8:1,9:1", "B": "5:2,6:2,7:3,8:1,9:1", "C": "5:3,6:1,7:3,8:1,9:2", "D": "5:3,6:2,7:2,8:1,9:2"}, "correct_answer": "A"},
    {"id": 57, "difficulty": "medium", "question": "Which is organized data? A) 3,1,4,2 B) Value:1 Freq:1 C) Random list D) Unordered", "options": {"A": "A", "B": "B", "C": "C", "D": "D"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "Ages: 10,12,11,10,13,12,11,10,14. Array?", "options": {"A": "10,10,10,11,11,12,12,13,14", "B": "14,13,12,12,11,11,10,10,10", "C": "10,12,11,10,13,12,11,10,14", "D": "10,11,10,12,13,10,12,11,14"}, "correct_answer": "A"},
    {"id": 59, "difficulty": "medium", "question": "Range: 0,8,15,3,12,7", "options": {"A": "12", "B": "13", "C": "14", "D": "15"}, "correct_answer": "D"},
    {"id": 60, "difficulty": "medium", "question": "Data: M,F,M,F,F,M,M,F,M,F. Frequency of F?", "options": {"A": "4", "B": "5", "C": "6", "D": "7"}, "correct_answer": "B"},
    {"id": 61, "difficulty": "medium", "question": "Arrange descending: 18,25,12,30,22,15,28", "options": {"A": "30,28,25,22,18,15,12", "B": "12,15,18,22,25,28,30", "C": "18,25,12,30,22,15,28", "D": "30,25,28,18,22,15,12"}, "correct_answer": "A"},
    {"id": 62, "difficulty": "medium", "question": "Marks: 40,50,60,40,70,50,60,40,80. Range?", "options": {"A": "30", "B": "35", "C": "40", "D": "45"}, "correct_answer": "C"},
    {"id": 63, "difficulty": "medium", "question": "Data: 2,4,3,2,5,4,3,2,6. Which value appears once?", "options": {"A": "2", "B": "4", "C": "5", "D": "6"}, "correct_answer": "D"},
    {"id": 64, "difficulty": "medium", "question": "Temperatures: 18.5,20.0,22.5,20.0,25.0,22.5,20.0. Frequency of 20.0?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 65, "difficulty": "medium", "question": "Range of: 100,85,120,95,110,130", "options": {"A": "40", "B": "45", "C": "50", "D": "55"}, "correct_answer": "B"},
    {"id": 66, "difficulty": "medium", "question": "Data: Yes,No,Yes,Yes,No,Yes,No,Yes. Frequency of Yes?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "C"},
    {"id": 67, "difficulty": "medium", "question": "Arrange ascending: 5.5,3.2,6.8,4.1,7.3,5.0", "options": {"A": "3.2,4.1,5.0,5.5,6.8,7.3", "B": "7.3,6.8,5.5,5.0,4.1,3.2", "C": "5.5,3.2,6.8,4.1,7.3,5.0", "D": "3.2,5.0,4.1,5.5,6.8,7.3"}, "correct_answer": "A"},
    {"id": 68, "difficulty": "medium", "question": "Weights: 45,50,55,50,60,55,50,65. Range?", "options": {"A": "15", "B": "20", "C": "25", "D": "30"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "medium", "question": "Data: A,A,B,C,B,A,D,A,B. Frequency of B?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 70, "difficulty": "medium", "question": "Which is raw data? A) Frequency table B) 7,3,9,5 C) Array D) Organized list", "options": {"A": "A", "B": "B", "C": "C", "D": "D"}, "correct_answer": "B"},
    {"id": 71, "difficulty": "medium", "question": "Scores: 75,80,85,90,75,85,80,75. Most frequent score?", "options": {"A": "75", "B": "80", "C": "85", "D": "90"}, "correct_answer": "A"},
    {"id": 72, "difficulty": "medium", "question": "Range: 22,18,25,20,30,15,28", "options": {"A": "12", "B": "13", "C": "14", "D": "15"}, "correct_answer": "D"},
    {"id": 73, "difficulty": "medium", "question": "Data: 1,3,2,1,4,3,2,1. Frequency table shows 1 appears:", "options": {"A": "2 times", "B": "3 times", "C": "4 times", "D": "5 times"}, "correct_answer": "B"},
    {"id": 74, "difficulty": "medium", "question": "Arrange descending: 12,25,8,30,18,22,15", "options": {"A": "30,25,22,18,15,12,8", "B": "8,12,15,18,22,25,30", "C": "12,25,8,30,18,22,15", "D": "30,22,25,18,15,12,8"}, "correct_answer": "A"},
    {"id": 75, "difficulty": "medium", "question": "Heights: 150,160,155,165,160,155,170. Range?", "options": {"A": "15", "B": "20", "C": "25", "D": "30"}, "correct_answer": "B"},
    {"id": 76, "difficulty": "medium", "question": "Data: X,Y,Z,X,Y,X. Frequency of X?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 77, "difficulty": "medium", "question": "Temperatures: 20,25,22,28,25,22,30. Array shows 22 appears:", "options": {"A": "Once", "B": "Twice", "C": "Thrice", "D": "Four times"}, "correct_answer": "B"},
    {"id": 78, "difficulty": "medium", "question": "Range of: 45,38,52,41,47,35,50", "options": {"A": "15", "B": "16", "C": "17", "D": "18"}, "correct_answer": "C"},
    {"id": 79, "difficulty": "medium", "question": "Data: 5,7,6,5,8,7,6,5,9. Which appears most?", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 80, "difficulty": "medium", "question": "Organized data helps in calculating:", "options": {"A": "Averages easily", "B": "Nothing", "C": "Confusion", "D": "Random values"}, "correct_answer": "A"},
    
    {"id": 81, "difficulty": "hard", "question": "Given raw data: 12,15,18,12,20,15,18,12,15,20,18,12. Create complete frequency distribution table. What is total frequency?", "options": {"A": "10", "B": "11", "C": "12", "D": "13"}, "correct_answer": "C"},
    {"id": 82, "difficulty": "hard", "question": "Data: 25,30,35,40,25,30,35,25,40,30,35,25,30. Find range and mode from organized data.", "options": {"A": "Range=15, Mode=25", "B": "Range=15, Mode=30", "C": "Range=20, Mode=25", "D": "Range=20, Mode=30"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "Organize: 4.5,3.2,5.1,4.5,6.0,3.2,5.1,4.5,6.0,3.2. Create array and find value with frequency 2.", "options": {"A": "3.2", "B": "4.5", "C": "5.1", "D": "6.0"}, "correct_answer": "D"},
    {"id": 84, "difficulty": "hard", "question": "Given: 18,22,25,30,18,25,22,30,18,25,22,18. What percentage of values are above 23 in organized data?", "options": {"A": "25%", "B": "33.3%", "C": "41.7%", "D": "50%"}, "correct_answer": "C"},
    {"id": 85, "difficulty": "hard", "question": "Data: A,B,C,A,B,D,A,B,C,A,B,E,A. Create frequency table and find relative frequency of B.", "options": {"A": "4/13", "B": "5/13", "C": "6/13", "D": "7/13"}, "correct_answer": "B"},
    {"id": 86, "difficulty": "hard", "question": "Marks: 45,50,55,60,45,50,55,45,60,50,55,45,50,55. Organize and find how many students scored more than 52.", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "D"},
    {"id": 87, "difficulty": "hard", "question": "Temperatures: 18.5,20.0,22.5,25.0,18.5,20.0,22.5,18.5,25.0,20.0,22.5,18.5. Find range to one decimal place.", "options": {"A": "6.0", "B": "6.5", "C": "7.0", "D": "7.5"}, "correct_answer": "B"},
    {"id": 88, "difficulty": "hard", "question": "Data: 100,120,150,100,130,120,150,100,140,120,150,100. After organization, what is frequency of median value if arranged?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 89, "difficulty": "hard", "question": "Heights: 150,155,160,165,150,155,160,150,165,155,160,150,155. Organize and find percentage below 158 cm.", "options": {"A": "53.8%", "B": "61.5%", "C": "69.2%", "D": "76.9%"}, "correct_answer": "B"},
    {"id": 90, "difficulty": "hard", "question": "Given: 7,12,9,15,7,12,9,18,7,12,9,21,7. Create frequency distribution. What is sum of frequencies of values less than 10?", "options": {"A": "6", "B": "7", "C": "8", "D": "9"}, "correct_answer": "C"},
    {"id": 91, "difficulty": "hard", "question": "Data: 22,28,25,31,22,28,25,34,22,28,25,37. Organize and find range divided by number of distinct values.", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "A"},
    {"id": 92, "difficulty": "hard", "question": "Ages: 14,16,15,17,14,16,15,18,14,16,15,19. After creating array, find difference between highest frequency and lowest frequency.", "options": {"A": "0", "B": "1", "C": "2", "D": "3"}, "correct_answer": "C"},
    {"id": 93, "difficulty": "hard", "question": "Scores: 75,80,85,90,75,80,85,95,75,80,85,100. Organize and find relative frequency of score 85 as decimal.", "options": {"A": "0.2", "B": "0.25", "C": "0.3", "D": "0.35"}, "correct_answer": "B"},
    {"id": 94, "difficulty": "hard", "question": "Data: 3.5,4.2,5.0,3.5,4.2,5.8,3.5,4.2,6.5,3.5,4.2. Create frequency table. What is total of all values multiplied by their frequencies?", "options": {"A": "40.5", "B": "42.3", "C": "44.1", "D": "45.9"}, "correct_answer": "B"},
    {"id": 95, "difficulty": "hard", "question": "Given: 45,55,65,45,55,75,45,55,85,45,55. Organize and find what percent of values are multiples of 15.", "options": {"A": "63.6%", "B": "72.7%", "C": "81.8%", "D": "90.9%"}, "correct_answer": "B"},
    {"id": 96, "difficulty": "hard", "question": "Data: 12,18,24,30,12,18,24,36,12,18,24,42. After organization, find ratio of frequency of 18 to frequency of 24.", "options": {"A": "1:1", "B": "2:3", "C": "3:4", "D": "4:5"}, "correct_answer": "A"},
    {"id": 97, "difficulty": "hard", "question": "Temperatures: 20.5,22.0,23.5,25.0,20.5,22.0,23.5,26.5,20.5,22.0,23.5. Organize and find range rounded to nearest whole number.", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "B"},
    {"id": 98, "difficulty": "hard", "question": "Given: 8,16,24,32,8,16,24,40,8,16,24,48. Create frequency distribution. What is average of distinct values?", "options": {"A": "20", "B": "22", "C": "24", "D": "26"}, "correct_answer": "C"},
    {"id": 99, "difficulty": "hard", "question": "Data: 150,160,170,180,150,160,170,190,150,160,170. Organize and find median value from frequency table.", "options": {"A": "150", "B": "160", "C": "170", "D": "180"}, "correct_answer": "B"},
    {"id": 100, "difficulty": "hard", "question": "Ages: 13,15,17,19,13,15,17,21,13,15,17. After creating array, find product of most frequent age and least frequent age.", "options": {"A": "39", "B": "45", "C": "51", "D": "57"}, "correct_answer": "D"}
  ]
}