Question

A spinner contains 3 equal sections: one red, one yellow, and one blue. The possible results of two spins are shown in the tree diagram below. What is P(red, then yellow)?

Answer 1

1/9

Explanation:

Probability of spinning a red = 1/3

Probability of spinning a yellow = 1/3

So Probability of getting red and then yellow = 1/3 x 1/3 = 1/9

Answer 2

1/9

3 x 3 = 9 (since it is spun twice)

1/9

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