Solve the problem.
-In the first two weeks of school, Jill studied 20 hours and 15 hours, respectively. How many hours must she study during the third week to give her an average of 20 hours per week?
A) 20 hours
B) 27.5 hours
C) 17.5 hours
D) 25 hours

Question

Quizplus · Accepted Answer

To achieve an average of 20 hours per week over three weeks, Jill needs to study a total of 60 hours (20 hours/week * 3 weeks). She has already studied 35 hours (20 hours + 15 hours). Therefore, she needs to study an additional 25 hours in the third week.

Solve the Problem. -In the First Two Weeks of School, Jill Studied 20