SOLUTION: A student has earned scores of 87, 81, and 88 on the first 3 of 4 tests. If the student wants an average (arithmetic mean) of exactly 87, what score must she earn on the fourth tes
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Question 258714: A student has earned scores of 87, 81, and 88 on the first 3 of 4 tests. If the student wants an average (arithmetic mean) of exactly 87, what score must she earn on the fourth test?
A. 85
B. 86
C. 87
D. 92
E. 93 Answer by vksarvepalli(154) (Show Source):
You can put this solution on YOUR website! for the average to be 87 the sum of all the scores should be 87*4=348
for 3 tests the sum is 87+81+88=256
so in the fourth test the student should get 348-256=92
ans. D
