SOLUTION: At the end of quarter 1, Sammy wants to have a 90% average. So far he has scored 88, 98, 91, and 70. There is one more test. What is the minimum he needs to score to get his 90% fo

Algebra ->  Average -> SOLUTION: At the end of quarter 1, Sammy wants to have a 90% average. So far he has scored 88, 98, 91, and 70. There is one more test. What is the minimum he needs to score to get his 90% fo      Log On


   

Question 928742: At the end of quarter 1, Sammy wants to have a 90% average. So far he has scored 88, 98, 91, and 70. There is one more test. What is the minimum he needs to score to get his 90% for the quarter
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
(88 + 98 + 91 + 70 + x)/5 = 90
(88 + 98 + 91 + 70) + x = 90*5
x = 90*5 - (88 + 98 + 91 + 70)
x = 103
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answer:
sammy will not be able average 90% for the quarter because it's impossible to score 103% on the fifth test (the most he could score on the fifth test is 100%)
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