Home Maths Probability Problem Based on Binomial Distribution / Expectation / Mean A fair coin is tossed 99 times. If X is the …
Maths Probability Problem Based on Binomial Distribution / Expectation / Mean Single Correct MCQ
Published on: August 14, 2026

A fair coin is tossed 99 times. If X is the number of times heads occur, if P (X = r) is maximum then sum of possible values of r is

A
98
B
99
C
101
D
104

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Text Solution

Verified by Experts
The correct answer is:
B

(q + p) 99 r ≤ ⇒ r ≤ ⇒ r ≤ 50

Terms 50 or 51 are highest, so r = 49, 50

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