Mathematics · 2022
JEE Main · 27 June 2022, Shift 1 · Q17
Let X be a random variable having binomial distribution B(7, p). If P(X=3)=5 P(X=4), then the sum of the mean and the variance of X is:
Let $\displaystyle X$ be a random variable having binomial distribution $\displaystyle B(7, p)$. If $\displaystyle P(X=3)=5 P(X=4)$, then the sum of the mean and the variance of X is :
Official answer
(3)
$\displaystyle \frac{77}{36}$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.