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Quiz

Grade 9: Data and probability

10 easy questions for grade 9, following the national curriculum: mean, median, mode, range, probability, relative frequency.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. What is the mean of 4, 6 and 8?

2. What is the median of 1, 4, 6, 8, 9?

3. What is the mode of 2, 3, 3, 5, 7?

4. What is the range of 3, 9, 4, 12?

5. The probability of rain tomorrow is 0.3. What is the probability of no rain?

6. We toss two coins. How many possible outcomes are there?

7. We roll a dice and toss a coin. How many outcomes are there?

8. In 50 coin tosses, heads came up 20 times. What is the relative frequency of heads?

9. A box has 3 red and 7 blue balls. What is the probability of drawing red?

10. “The more hours a pupil studies, the better the result.” What kind of correlation is this?