SOLUTION: 83, 78, 88,and X have a mean of 82 what is the value of X?

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Question 765351: 83, 78, 88,and X have a mean of 82 what is the value of X?
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
Mean is the same as the "average" of the 4.
Average of n numbers = sum of the n numbers / n.
(83+78+88+X)/4 = 82
249 + X = 82*4 = 328
X = 328 - 249 = 79
:)