SOLUTION: Martin’s average (arithmetic mean) score after 4 tests is 89. What score on the 5th test would bring Martin’s average up to exactly 90?
(A) 90 (B) 91 (C) 92 (D) 93 (E) 94
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-> SOLUTION: Martin’s average (arithmetic mean) score after 4 tests is 89. What score on the 5th test would bring Martin’s average up to exactly 90?
(A) 90 (B) 91 (C) 92 (D) 93 (E) 94
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Question 327984: Martin’s average (arithmetic mean) score after 4 tests is 89. What score on the 5th test would bring Martin’s average up to exactly 90?
(A) 90 (B) 91 (C) 92 (D) 93 (E) 94
You can put this solution on YOUR website! average score of 4 tests =89
total in these 4 tests = 4*89=356
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average of 5 tests should be 90
so total of 5 tests should be 5*90= 450
..
450-356 = 94
He should score 94 in the 5th test
