ProbabilityHard
Question
One hundred Identical coins each with probability P of showing up heads are tossed once. It 0 < P < 1 and probability of heads showing on 50 coins is equal that of heads showing on 51 coins, then the value of P is :-
Options
A.
B.
C.
D.
Solution
100C50 P50 q50 = 100C51 P51 q49
(where q = 1 - P)

⇒ P = 
(where q = 1 - P)
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