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A bag contains 10 white and 3 black ball...

A bag contains 10 white and 3 black balls . Balls are drawn one by one without replacement till all the black balls are drawn .The probability the procedure comes to an end at the seventh draw is :

A

`105/286`

B

`15/286`

C

`181/286`

D

`45/286`

Text Solution

Verified by Experts

The correct Answer is:
B
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