Answer :

Given: A bag containing 10 white and 15 black balls .Each trial is independent of the other trial.

To find: the probability that the first ball is drawn is white and the second ball drawn is black.

Let , success in the first draw be getting a white ball.

Now , the Probability of success in the first trial is

P_{1}(success) =

Let success in the second draw be getting a black ball.

Probability of success in the second trial without replacement of the first draw is given by

P_{2}(success) =

Hence , the probability that the first ball is drawn is white and the second ball drawn is black,with each trial being independent is given by

P_{1} P_{2} = =

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