SOLUTION: Angelo�s marks on the first three tests are 10/20, 15/20, and 17/20 what mark would he have to get on the next test to make his average on all four tests 15/20 ? a) 15/20 b) 1

SOLUTION: Angelo�s marks on the first three tests are 10/20, 15/20, and 17/20 what mark would he have to get on the next test to make his average on all four tests 15/20 ? a) 15/20 b) 1

Algebra.Com

Question 238044: Angelo�s marks on the first three tests are 10/20, 15/20, and 17/20 what mark would he have to get on the next test to make his average on all four tests 15/20 ?
a) 15/20 b) 16/20 c) 17/20 d) 18/20 e) 20/20
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
(10/20 + 15/20 + 17/20 + x)/4=15/20
x + 42/20 = 60/20
x=60/20 - 42/20
= 18/20
.
Ed
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