Mean or Expected Value and Standard Deviation · Exercise 11

A ballet instructor is interested in knowing what percent of each year's class will continue on to the next, so that she can plan what classes to offer. Over the years, she has established the following probability distribution.

Complete using the data provided.

$$\begin{array}{ccc}\text{x}& \text{P(x)}& \text{x*P(x)}\\ \text{1}& \text{0.10}& \\ \text{2}& \text{0.05}& \\ \text{3}& \text{0.10}& \\ \text{4}& & \\ \text{5}& \text{0.30}& \\ \text{6}& \text{0.20}& \\ \text{7}& \text{0.10}& \end{array}$$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Statistics 2e · §4.2 Mean or Expected Value and Standard Deviation · Exercise 11