When a coin is tossed, the probability of getting a Head is p, 0 < p < 1. Let…
GATE · 2006 · IT
When a coin is tossed, the probability of getting a Head is p, 0 < p < 1. Let N be the random variable denoting the number of tosses till the first Head appears, including the toss where the Head appears. Assuming that successive tosses are independent, the expected value of N is
- A.
1/p
- B.
1/(1−p)
- C.
1/p^2
- D.
1/(1-p^2)
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