A bag P contains 5 white marbles and 3 b...

A bag P contains 5 white marbles and 3 black marbles. Four marbles are drawn at random form P and are put in an empty bag Q . If a marble drawn at rnadom from Q is found to be black then the probabiity that all the three black marbles in P are transfered to the bag Q is

A

`(1)/(8)`

B

`(7)/(8)`

C

`(6)/(8)`

D

`(1)/(7)`

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The correct Answer is:

D

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