Core Mathematics

1Two dice are thrown. Find the probability that the sum is greater than 9.

2In a set of 20 scores, the cumulative frequency up to 40 marks is 15. The percentage scoring above 40 is

3A die is thrown twice. P(the same number both times) is

4The frequencies of scores 1, 2, 3, 4 are 2, 3, 4, 1. What is the modal score?

5In a pie chart, a sector of 72° represents what fraction of the total?

6The mean of 5 numbers is 12. If one number is removed the mean becomes 10. The number removed is

7The mean of 5 numbers is 12. If one number is removed, the mean of the rest is 11. The removed number is

8Three coins are tossed. P(exactly two heads) is

9A bag has 4 red and 6 blue balls. Two are drawn without replacement. P(both red) is

10Two coins are tossed. P(at least one head) is