ProbabilityHard
Question
A fair coin is tossed 99 times. If X is the number of times heads occur, then P (X = r) is maximum when r is
Options
A.49
B.50
C.51
D.none of these
Solution
(p + q)99 r ≤ 
⇒ r ≤ 
⇒ r ≤ 50
Terms 50 or 51 are highest
⇒ r ≤ ⇒ r ≤ 50Terms 50 or 51 are highest
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