Problema Solution
A student gets an 89.4% on his last five exams. The student has one more exam left what percent does the student need to get on his last exam to have an average of 90%.
Answer provided by our tutors
let
x = the percent on the last exam
(5*89.4 + x)/6 = 90
by solving we find:
x = 93%
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the student needs to get 93% on his last exam.