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A biased coin with probability p, 0 lt p...

A biased coin with probability `p, 0 lt p lt 1`, of heads is tossed until a head appears for the first time. If the probability that the number of tosses required is even is `2//5`, then p is equal to

A

`1//3`

B

`2//3`

C

`2//5`

D

`3//5`

Text Solution

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The correct Answer is:
A
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