Test Academy | Suppose the probability that a coin toss shows “head” is p, where 0<p<1. The coin is tossed repeatedly until the first “head” appears. The expected number of tosses required is p/1-p, 1-p/p, 1/p, 1/p2

Question

Suppose the probability that a coin toss shows “head” is p, where 0<p<1. The coin is tossed repeatedly until the first “head” appears. The expected number of tosses required is

Options :

p/1-p
1-p/p
1/p
1/p²

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