Question 9 — IGCSE 0580 May/June 2023 Paper 31
Cambridge IGCSE Mathematics 0580, Core tier, calculator. Topic: Probability · General. Worth 6 marks.
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Question text
9 (a) Maria spins a fair 7-sided spinner numbered 1 to 7.
2 3
1 4
7 5
6
4
Explain why the probability that the spinner lands on a prime number is .
7
[2]
(b) Maria spins the spinner a 2nd time.
1st spin 2nd spin
Prime
....................
Prime
4
7
Not prime
....................
Prime
....................
....................
Not prime
Not prime
....................
(i) Complete the tree diagram. [2]
(ii) Work out the probability that the spinner lands on a prime number both times.
................................................. [2]
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