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Question

In a binomial distribution, the probability of getting success is 1/4 and standard deviation is 3. Then, its mean is
(a) 6
(b) 8
(c) 12
(d) 10

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Solution

(c) 12

p =14 q= 1-14=34Standard deviation =3 Variance = 32=9Or npq = 9 np =9q= 363=12Therefore, the mean of the given binomial distribution is 12.

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