# 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

**Solution:**

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.

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

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.

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

**Summary:**

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

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