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Quiz

Cambridge Mathematics 9: Probability

10 questions with solutions on the Cambridge Mathematics 9 topic: probability of an event, the complement, two events, expected number, relative frequency.

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

1. A fair dice is thrown. The probability of an even number?

2. A bag has 3 red and 5 blue balls. The probability of red?

3. The probability of rain is 0.3. What is the probability of no rain?

4. Two coins are tossed. The probability of two heads?

5. Two dice are thrown. How many possible outcomes are there?

6. Two dice are thrown. The probability that the total is 7?

7. The probability of winning is 0.2. In how many of 50 games do you expect to win?

8. A dice is thrown 60 times and lands on six 18 times. What is the relative frequency of a six?

9. A and B cannot both happen. P(A) = 0.4 and P(B) = 0.35. P(A or B)?

10. A spinner shows 1–5, each equally likely. The probability of a prime number?