A student wants to earn a C for a class. To get this grade, the average of his six test scores must be 70. He has the following grades on five tests: 60, 78, 65, 68, 72 What grade must the student get...

Extracted text: A student wants to earn a C for a class. To get this grade, the average of his six test scores must be 70. He has the following grades on five tests: 60, 78, 65, 68, 72 What grade must the student get on the next test so that the average of his scores is 70? Enter your answer as a number, like this: 42