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A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacing it, and then picking a black marble?

2 Answers

4 votes
5+6+4=15
blue marble = 6 out of 15
replacing blue marble for black = 4 out of 14
User Algorithmitcus
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4 votes
P(blue) = 6/15
P(black) = 4/15

P(blue\ then\ black)=(6)/(15)*(4)/(15)=(8)/(75)
The required value of probability is 8/75.
User Drew Marsh
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