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A bag contains 6 green, 2 white, and 7 black balls. If two balls are drawn simultaneously, then the probability that both are different colours is

A

`68/105`

B

`71/105`

C

`64/105`

D

`73/105`

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The correct Answer is:
A
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  14. There are three events A, B and C of which one and only one can happen...

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  16. It is given that the events A and B are such that P(A) = 1/4, P (A//B)...

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