Let `X` be the discrete random variable. Then the variance of `X` is a. `E(X^2)` b. `E(X^2)+(E(X))^2` c. `E(X^2)-(E(X))^2` d. `sqrt(E(X^2)-(E(X))^2)`

Explanation

Here we have `X` is the discrete random variable


So,

`
Var(X)=E(X^2)-(E(X))^{2}
`