SOLUTION: Gary earned 78%, 83% and 90% percent on his first three tests. What percent do you need on the fourth test to obtain a test average of 86%
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Question 707301: Gary earned 78%, 83% and 90% percent on his first three tests. What percent do you need on the fourth test to obtain a test average of 86%
Answer by vheroli(126) (Show Source): You can put this solution on YOUR website!
Test 1: 86- 78 = 8
Test 2: 86- 83 = 3
Test 3: 86- 90 = -4
8+3+ (-4) = 7
Test 4: 86+7 = 93
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