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A box contains 4 white and 5 black balls...

A box contains 4 white and 5 black balls. A ball is drawn at random and its colour is noted. A ball is then put back in the box along with two additional balls of its opposite colour. If a ball is drawn again from the box, then the probability that the ball drawn now is black, is

A

`5//11`

B

`53//99`

C

`48//99`

D

`7//11`

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The correct Answer is:
B
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