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4.4 Probability (A-level only)

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Question 31

A drawer contains 6 black socks, 10 blue socks, and 4 white socks. Two socks are removed from the drawer at random without replacement.

a.

Draw a tree diagram to represent this information.

[3]
b.

Find the probability that the two socks removed are both white.

[2]
c.

Given that at least one of the socks removed is blue, find the probability that both socks are blue.

[3]

4.4 Probability (A-level only) Questions

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