A student has scores of 76, 78.75, and 81 on his first three tests. He needs an average of at least 80 to earn a grade of B. What is the minimum score that the student needs on the fourth test to ensure a B? Note: The answer need not be an integer.

A student has scores of 76, 78.75, and 81 on his first three tests. He needs an average of at least 80 to earn a grade of B. What is the minimum score that the student needs on the fourth test to ensure a B? Note: The answer need not be an integer.

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter14: Counting And Probability

Section14.CT: Chapter Test

Problem 5CT: A commuter must travel from Ajax to Barrie and back every day. Four roads join the two cities. The...

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Question

A student has scores of 76, 78.75, and 81 on his first three
tests. He needs an average of at least 80 to earn a grade of
B. What is the minimum score that the student needs on the
fourth test to ensure a B?
Note: The answer need not be an integer.

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