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If odds against solving a question by th...

If odds against solving a question by three students are 2:1, 5:2, and 5:3, respectively, then probability that the question is solved only by one student is

A

1) `(31)/(56)`

B

2) `(24)/(56)`

C

3) `(25)/(56)`

D

4) None of these

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The correct Answer is:
C
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