SOLUTION: Lisa recorded her first 4 scores in a Math test. 86%,94%,78%,97%. In order to get an A She needs to have an average of 90%. What must she get on her 5th test to get an A?
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Question 985090: Lisa recorded her first 4 scores in a Math test. 86%,94%,78%,97%. In order to get an A She needs to have an average of 90%. What must she get on her 5th test to get an A? Answer by macston(5194) (Show Source):
You can put this solution on YOUR website! .
To average 90 over 5 scores, the sum of the scores must be (5 x 90)=450
86+94+78+97=355
450-355=95
ANSWER: She needs 95 on her fifth test to average 90.
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