Jim has gotten scores of 78 and 69 on his first two tests. What score must he get on his third test to 26) keep an average of 70 or greater?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.6: Counting Principles
Problem 8ECP: In how many different ways can two letters be chosen from the letters A, B, C, D, E, F, and G? (The...
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26) Jim has gotten scores of 78 and 69 on his first two tests. What score must he get on his third test to 26) keep an average of 70 or greater?

A) At least 72.3 B) At least 73.5 C) At least 63 D) At least 62

 

answer is C

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