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A bag contains 5 black balls 4 white bal...

A bag contains 5 black balls 4 white balls and 3 red balls . If a ball is selected at random , the probability that it is a black or a red ball, is

A

`1/3`

B

`1/4`

C

`(5)/(12)`

D

`2/3`

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The correct Answer is:
D
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