SOLUTION: three exam scores of 70, 60, and 40 what score would you need on the fourth exam to give an average of 72.0

Question 15154: three exam scores of 70, 60, and 40 what score would you need on the fourth exam to give an average of 72.0
Answer by pramboggle(1) (Show Source): You can put this solution on YOUR website!
To find the mean (or average) of a problem you add together the numbers then divide by however many numbers there are. In this case you only have 3 of the 4 numbers you need. Use x for the fourth.

Then yoy want to solve for x. Make the 72 a .
Then cross multiply.

If you want to check your answer you go back and plug in 118 for x.

It works! So 118 is your answer.
RELATED QUESTIONS
A student has scores of 75, 79, and 81 on three government exams. What score does she... (answered by jim_thompson5910)

In an algebra class a student has scores of 65, 72, and 84 on three exams. What score on... (answered by jim_thompson5910)

A Student has scores of 73,79, and 81 on three government exams. What score does she need (answered by jim_thompson5910,jojo14344)

Going into the final exam, which counts as three grades, Mark has test scores of 65, 79,... (answered by Earlsdon)

If you earn a score of 72% on one exam and a score of 85% on another exam, what will you... (answered by nabla)

A mathematics student has scores of 74, 78, and 70 on three examinations. What score is... (answered by Fombitz)

a student has scores of 76,72, and 75 on three exams. what minimum score is needed on a... (answered by rfer)

An average score of 90 or above in a math class receives an A grade. You have scores of... (answered by FrankM)

A student has scores of 73, 76, and 83 on three exams. What score is needed on a fourth... (answered by ewatrrr)