By using the concept of weighted averages, the weighted average of the given values is equal to 7.35.
Weighted average is a kind of average in which each element has an specific weight in contrast with uniform average, where each element has the same weight. In this problem we have three values associated to three distinct weights, whose weighted average is:
x = 0.75 · 7 + 0.15 · 8 + 0.10 · 9
x = 7.35
By using the concept of weighted averages, the weighted average of the given values is equal to 7.35.
To learn more on weighted averages: https://brainly.com/question/18554478
#SPJ1
