SOLUTION: Number Set: 11, 9, 18, 24, 8, 14 - What number do you need to add to the set to make the mean equal to 15?

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Question 339191: Number Set: 11, 9, 18, 24, 8, 14
- What number do you need to add to the set to make the mean equal to 15?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: Add in some unknown number 'x' to get 11, 9, 18, 24, 8, 14, x


Now compute the mean to get %2811%2B9%2B18%2B24%2B8%2B14%2Bx%29%2F7. Since you want the mean to be 15, this means that %2811%2B9%2B18%2B24%2B8%2B14%2Bx%29%2F7=15


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Jim