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The mean and variance of a binomial dist...

The mean and variance of a binomial distribution are 4 and 3 respectively, then the probability of getting exactly six successes in this distribution, is a. `\ ^(16)C_6(1/4)^(10)(3/4)^6` b. `\ ^(16)C_6(1/4)^6(3/4)^(10)` c. `\ ^(12)C_6(1/(20))^(\ )(3/4)^6` d. `\ ^(12)C_6(1/4)^6(3/4)^6`

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