Question

Greg receives the following scores on his math tests: {90, 83, 78, 95}. What is the minimum score he needs on the last math test in order to get an 85 average in the class?

Answer 1

79

Explanation:

the total of 90, 83, 78, 95= 346 which averages to 86.5

346+79=425

425/5= 85