SOLUTION: So far in geography class, a student's quiz scores are 86%, 84%, 76%, and 72%. What score does the student need on the fifth quiz to have a mean quiz score of 81%? All the quizzes

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Question 1043625: So far in geography class, a student's quiz scores are 86%, 84%, 76%, and 72%. What score does the student need
on the fifth quiz to have a mean quiz score of 81%? All the quizzes have equal weights.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+%28+.86+%2B+.84+%2B+.76+%2B+.72+%2B+x+%29+%2F+5+=+.81+
+.86+%2B+.84+%2B+.76+%2B+.72+%2B+x+=+4.05+
+3.18+%2B+x+=+4.05+
+x+=+.87+
The student needs 87% on the 5th quiz