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2.3.2 Diagrams to assist probability calculations

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Question 15

A drawer contains 8 white socks, 6 black socks, and 6 grey socks. Two socks are pulled 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 pulled are both grey.

[2]
c.

Given that at least one of the socks pulled is black, find the probability that both socks are black.

[3]

2.3.2 Diagrams to assist probability calculations Questions

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  3. /2.3.2 Diagrams to assist probability calculations