The mean of a set of four test scores is 79. If three test scores are 77, 79, and 85, what is the fourth test score? a. 83 b. 81 c. 79 d. 75

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asked Sep 17, 2017 192k views

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Piers C · Answer 1 · 2017-09-22T16:21:25+0000

The answer would be D. 75
77+79+85+x=241

Let's see what 83+241=324/4=81 A is out.

81+241=322/4= 80.5 so B is out.

79+241=320/4=80 so C is out.

241+75=316/4 which is 79 is the correct answer.

The mean of a set of four test scores is 79. If three test scores are 77, 79, and 85, what is the fourth test score? a. 83 b. 81 c. 79 d. 75

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