Q32Single correct3 Marks7 Aug 2022

If a random variable X is exponentially distributed with parameter $\lambda$ and $P(X \le 1) = P(X > 1)$, then what is the value of $\operatorname{\operatorname{Var}}(X)$?

A

ln 2

B

(ln 2)^2

C

1 / ln 2

D

1 / (ln 2)^2