SOLUTION: how do you do, After 5 tests, a student’s average was 80. After taking an examination which
counted as two test grades, his average dropped to 76. What was his grade on that
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Question 149453: how do you do, After 5 tests, a student’s average was 80. After taking an examination which
counted as two test grades, his average dropped to 76. What was his grade on that
examination?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
after 5 grades with an 80 average, his aggregate (total score) was 5*80 or 400
after 7 grades with an 76 average, his aggregate (total score) was 7*76 or 532
the difference (132) is the double test grade __ so his test grade was 132/2 or 66
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