JEE Math Practice Question
Let X be a random variable having binomial distribution B(7, p). If P(X = 3) = 5P(x = 4), then the sum of the mean and the variance of X is :
- A.$${105 \over {16}}$$
- B.$${7\over {16}}$$
- C.$${77\over {36}}$$
- D.$${49\over {16}}$$
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