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Four persons independently solve a certa...

Four persons independently solve a certain problem correctly with probabilities `1/2,3/4,1/4,1/8` . Then the probability that the problem is solved correctly by atleast one of them is :

A

`235/256`

B

`21/256`

C

`3/256`

D

`253/259`

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The correct Answer is:
A
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