Solve the problem.
-Jim has gotten scores of 78 and 69 on his first two tests. What score must he get on his third test to keep an average of 70 or greater?
A) At least 63
B) At least 62
C) At least 72.3
D) At least 73.5

Question

Quizplus · Accepted Answer

To keep an average of 70 or greater, Jim's total score on the three tests must be at least 210 (70 x 3). His current total score is 78 + 69 = 147. 
So, Jim needs to score at least 63 on his third test to reach a total score of 210. Therefore, the best choice is A. To keep an average of 70 or greater, Jim's total score on all three tests should be at least 210 (70 x 3). His current total score on the first two tests is 78 + 69 = 147. Therefore, he needs to get at least 63 on his third test to reach a total score of 210. So, the correct answer is choice A.

Solve the Problem. -Jim Has Gotten Scores of 78 and 69 on His