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A and B are two students. Their chances ...

A and B are two students. Their chances of solving a problem correctly are `1/3a n d1/4` respectively. If the probability of their making common errors is `1/(20)` and they obtain the same answer, then the probability of their answer to be correct is `(10)/(13)` b. `(13)/(120)` c. `1/(40)` d. `1/(12)`

A

`(1)/(12)`

B

`(1)/(40)`

C

`(13)/(120)`

D

`(10)/(13)`

Text Solution

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The correct Answer is:
D
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