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A biased coin with probability p(0 lt pl...

A biased coin with probability `p(0 lt plt 1)` of falling tails is tossed until a tail appears for the first time. If the probability that tail comes in odd number of trials is `(2)/(3)`, then `p` equals

A

`1/2`

B

`1/3`

C

`1/4`

D

`1/5`

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The correct Answer is:
B
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