Question

5. Joe, Jim, Ravi & Azaad got an average of 75 points each in a quiz. What was their total score?​

Answer 1

Since the student's average test score on 4 tests is 78, then the sum of the first 4 test scores is 4*78=312. We need the sum of ALL 5 scores to be 5*80=400, so if is the 5th test score, then --> .

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