SOLUTION: Larry's average (arithmetic mean) score on the first four of five tests is 88. If Larry wants to raise his average by 2 points, what score must he earn on his fifth test?
Thanks
Algebra.Com
Question 463419: Larry's average (arithmetic mean) score on the first four of five tests is 88. If Larry wants to raise his average by 2 points, what score must he earn on his fifth test?
Thanks
Answer by alicealc(293) (Show Source): You can put this solution on YOUR website!
(4*88 + x)/5 = 88 + 2
(352 + x)/5 = 90
352 + x = 90 * 5
352 + x = 450
x = 450 - 352 = 98
so, for the fifth test, he must earn 98
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