# Identify the expression for calculating the mean of a binomial distribution (n, p).

## a) np(1-p) b) np c) n(1-p) d) n^{2}p

The binomial distribution is a discrete probability distribution, which can only result in a success or a failure. The Binomial theorem formula is used to calculate the probability. Some of the examples include finding the probability of heads after tossing a coin, probability of hitting the bullseye.

## Answer: The expression for the mean of the binomial distribution (n, p) is np. Hence, option b) is the correct option.

Let's look at the explanation to understand the problem.

**Explanation:**

Option a) : np(1-p) is the expression for the variance of the binomial distribution. Hence it is incorrect.

Option c) & d): n(1-p) and n^{2}p are incorrect answers.

Option b) : np is the expression for the mean of the binomial distribution. Hence it is the correct answer.