A student needs a...

Question

A student has scores of 58.25, 58.75, and 61 on his first three tests. He needs an average of at least 60 to earn a grade of D. What is the minimum score that the student needs on the fourth test to ensure a D?

Answer 1

(58.25 + 58.75 + 61 + x)/4 ≥ 60

 

(178 + x)/4 ≥ 60

 

178 + x ≥ 240

 

x ≥ 62

 

He must score at least a 62.