Answer:
A student's average (arithmetic mean) test score on 4 tests is 78. What must be the student's score on a 5th test for the student's average score on the 5 tests to be 80?
(A) 80
(B) 82
(C) 84
(D) 86
(E) 88
E;88
Step-by-step explanation:
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Answer:
A student's average (arithmetic mean) test score on 4 tests is 78. What must be the student's score on a 5th test for the student's average score on the 5 tests to be 80?
(A) 80
(B) 82
(C) 84
(D) 86
(E) 88
E;88
Step-by-step explanation: