Practice!

Sample Problem

A jar contains black and white marbles. Two marbles are chosen without replacement. The probability of selecting a black marble and then a white marble is 0.34, and the probability of selecting a black marble on the first draw is 0.47. What is the probability of selecting a white marble on the second draw, given that the first marble drawn was black?

Enter your answer as a decimal rounded to the nearest hundredth.

Solution

P(B|A) = P(White|Black) =