Given the Variance of a Bernoulli Random Variable, Find Its Expectation
Problem 748
Suppose that $X$ is a random variable with Bernoulli distribution $B_p$ with probability parameter $p$.
Assume that the variance $V(X) = 0.21$. We further assume that $p > 0.5$.
(a) Find the probability $p$.
(b) Find the expectation $E(X)$.
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