You have three pens coloured blue, red, and green. You pick one at random and then you pick another without replacement. (a) Find the conditional probability that the second pen is blue, given the first pen is red. (b) Find the conditional probability that the first pen is red, given the second pen is blue

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
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Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 50E: Medicine Out of a group of 9 patients treated with a new drug, 4 suffered a relapse. Find the...
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You have three pens coloured blue, red, and green. You pick one at random and then you pick another without replacement. (a) Find the conditional probability that the second pen is blue, given the first pen is red.
(b) Find the conditional probability that the first pen is red, given the second pen is blue.

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