Problema Solution
Joseph has scores of 87, 89, and 92 on his first three weekly algebra exams.
What score must he get on the Final Exam to have an average of 90 or better for the four exams (assume that all four exams are weighted equally)?
thanks
Answer provided by our tutors
let f = the score on the Final Exam
the average of the four exams is 90 or more
(87 + 89 + 92 + f)/4 >= 90
by solving we find
f >= 92
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On his Final Exam Joseph must get a score 92 or more.