The Normal Approximation to the Binomial Distribution Is Most Useful $\leq$

Multiple Choice

The normal approximation to the binomial distribution is most useful for finding which of the following?

A) The probability P(X = k) when X is a binomial random variable with small n.
B) The probability P(X $\leq$ k) when X is a binomial random variable with large n.
C) The probability P(X = k) when X is a normal random variable with small n.
D) The probability P(X $\leq$ k) when X is a normal random variable with large n.