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Year 12 Methods (Unit 3 & 4) Refresher on probability and discrete random variables

Conditional probability and independence

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Question 1
15269

A sack contains 5 blue,3 yellow and 2 black balls. Two balls are drawn from the sack without replacement. If the first ball drawn is yellow, what is the probability that the second ball drawn is black?

\(\dfrac{2}{9}\)

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