Two coins are available, one fair and th...

Two coins are available, one fair and the other two-headed. Choose a coin and toss it once; assume that the unbiased coin is chosen with. probability `3/4.` Given that the outcome is head the probability that the two-headed coin was chosen, is

A

`3/5`

B

`2/5`

C

`1/5`

D

`2/7`

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The correct Answer is:

B

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