In this lesson, we will learn how to calculate the mean and standard deviation of a binomial random variable.

Q1:

In a binomial experiment, the probability of a success in each trial is 0.6. If 25 trials are performed, what is the median?

Q2:

In a binomial experiment, the probability of success in each trial is 0.2 and 40 trials are performed. Let 𝑋 be the random variable which counts the number of successes. Find the variance of 𝑋.

Q3:

A binomial experiment has been set up to measure the number of successes, 𝑋, of 𝑛 trials, where the probability of success in each trial is 𝑝. State the expected number of successes.

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