alleryStart learning →The mean of the numbers 4, 8, 6, 10 and 12 is
- 6
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Show answer and solution
Correct answer: C. 8
The five numbers add up to 40, and 40 divided by 5 is 8.
Olympiad (Class 7) Data interpretation and analysis — practice questions
Explore 68 free Data interpretation and analysis questions in Olympiad (Class 7) Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–30 of 68.
The mean of the numbers 4, 8, 6, 10 and 12 isRead the answer and worked solution →What is the median of 3, 9, 5, 7 and 11?Read the answer and worked solution →Find the mode of 2, 3, 3, 5, 7, 3, 8.Read the answer and worked solution →The mean of 5 numbers is 12. What is the sum of the numbers?Read the answer and worked solution →Five numbers have mean 20. A sixth number, 8, is added. What is the new mean?Read the answer and worked solution →Four numbers have mean 25. Three of them are 20, 30 and 22. What is the fourth?Read the answer and worked solution →For the marks 40, 45, 50, 45 and 60, the mean exceeds the median byRead the answer and worked solution →How many modes does the data 7, 7, 9, 9, 11 have?Read the answer and worked solution →The numbers 3, 5 and 10 each go up by 4. What is the new mean?Read the answer and worked solution →Every value in 2, 4, 6, 8, 10 is doubled. The new median isRead the answer and worked solution →In the data 10, 12, 11, 13, 64, which measure is least affected by the value 64?Read the answer and worked solution →For the data 10, 12, 11, 13, 64, how much larger is the mean than the median?Read the answer and worked solution →In a bar chart, the height of each bar is proportional toRead the answer and worked solution →In a survey of 200 students, 50 prefer cricket. In a pie chart, its sector angle isRead the answer and worked solution →A pie chart covers 500 people. One sector has angle 72 degrees. How many people does it show?Read the answer and worked solution →Three pie sectors measure 120, 90 and 60 degrees. The only other sector measuresRead the answer and worked solution →A pie chart of 80 pupils gives chess a 45 degree sector. How many play chess?Read the answer and worked solution →A family spends Rs 24000 a month. Rent has a 150 degree pie sector. What is the rent?Read the answer and worked solution →What angle on a pie chart stands for 20 percent of the data?Read the answer and worked solution →Which number cannot be the probability of an event?Read the answer and worked solution →What is the chance of not getting a six when a fair die is rolled once?Read the answer and worked solution →A fair die is rolled once. The probability of an even number isRead the answer and worked solution →A bag has 3 red and 5 blue balls. One is drawn at random. P(red) isRead the answer and worked solution →A bag has 4 red and 6 green balls. What is the probability of drawing a ball that is not red?Read the answer and worked solution →A quiz counts at weight 1 with score 60, and an exam counts at weight 2 with score 90. The weighted mean isRead the answer and worked solution →A mean of 10 readings was found as 40, but a reading of 70 was copied as 30. The true mean isRead the answer and worked solution →The mean of 8 numbers is 24. When one more number is included, the mean becomes 25. The new number isRead the answer and worked solution →Five players average 20 years. A coach aged 32 joins them. The average age of the six becomesRead the answer and worked solution →The median of 1, 2, 3 and 100 isRead the answer and worked solution →A shop wants to know which shoe size sells most often. Which measure helps?Read the answer and worked solution →
Worked practice questions
What is the median of 3, 9, 5, 7 and 11?
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- 6
Show answer and solution
Correct answer: B. 7
In order the numbers are 3, 5, 7, 9, 11, and the middle one is 7.
Find the mode of 2, 3, 3, 5, 7, 3, 8.
- 3
- 5
- 7
- 8
Show answer and solution
Correct answer: A. 3
The value 3 occurs three times, more often than any other value.
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