Question

A student has scores of 63, 65, and 73 on his first three tests. He needs an average of at least 70 to earn a grade of C in the class.

What is the minimum score that the student needs on the fourth test to ensure a C?

Answer 1

Answer: 79

Explanation:

63+65+73+×/4=79

multiply by 4 on both sides

201+x=280

subtract 201 from both sides

x= 79