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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

`(2)/(3)`

B

`(1)/(2)`

C

`(1)/(3)`

D

`(1)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
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