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2.3.2 Diagrams to assist probability calculations

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Question 12

A jar contains 7 yellow marbles, 5 purple marbles, and 8 green marbles. Two marbles are selected at random from the jar without replacement.

a.

Draw a tree diagram to represent this information.

[3]
b.

Find the probability that both marbles selected are purple.

[2]
c.

Given that at least one of the marbles selected is yellow, find the probability that both marbles are yellow.

[3]

2.3.2 Diagrams to assist probability calculations Questions

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  3. /2.3.2 Diagrams to assist probability calculations