Chapter 17, Problem 17.9E

Interpretation Introduction

Interpretation:

The average scores on an exam in two different ways and the same average score is obtained is to be stated.

Concept introduction:

To determine the average values of some variables, probabilities can be used. The formula to find the average is as follows:

$\stackrel{-}{u}=\frac{{\displaystyle \sum _{j=1}^{\text{possible}\text{values}}{u}_j\cdot P_j}}{{\displaystyle \sum _j{P}_j}}$