Mandy wants to earn a​ 90% overall average in her mathematics class. She has grades of 90​,87​, and 92 thus far in the course. What grade does Mandy need to average on the next two assessments to earn a​ 90% overall​ average?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Mandy wants to earn a​ 90% overall average in her mathematics class. She has grades of 90​,87​, and 92 thus far in the course. What grade does Mandy need to average on the next two assessments to earn a​ 90% overall​ average?

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