In a bag there are 12 purple marbles and 8 red ones are drawn at random and left out immediately another marble is drawn a) If the second marble turns out to be purple, what is the probability that the first marble turned out to be red? b) Find the probability that both marbles are the same color.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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In a bag there are 12 purple marbles and 8 red ones are drawn at random and left out immediately another marble is drawn

a) If the second marble turns out to be purple, what is the probability that the first marble turned out to be red?
b) Find the probability that both marbles are the same color.

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