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A student s average (arithmetic mean) test score on 4 tests

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A student s average (arithmetic mean) test score on 4 tests [#permalink] New post 11 Nov 2008, 13:42
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
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Re: score [#permalink] New post 11 Nov 2008, 19:41
haichao wrote:
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


Recently posted Q.
Refer this t72749
Re: score   [#permalink] 11 Nov 2008, 19:41
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A student s average (arithmetic mean) test score on 4 tests

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