Let a random variable X have a binomial distribution with mean 8 and variance 4. If P(X < 2) = , 2 k 16 then k is equal to :

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Let a random variable X have a binomial distribution with mean 8 and variance 4. If P(X < 2) = , 2 k 16 then k is equal to :

(1) 17 (2) 1 (3) 137 (4) 121

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Correct option  (3) 137

Explanation: