SOLUTION: The average <i>of a</i> set of n numbers is 23. When -35 is added to the set, the average is 21. How many numbers were in the original set??
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Question 1129668: The average of a set of n numbers is 23. When -35 is added to the set, the average is 21. How many numbers were in the original set?? Answer by solver91311(24713) (Show Source):
If the average of a set of numbers is 23, then the sum of those numbers must be . If you add -35 to that sum and divide by you get the new average of 21, so:
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John
My calculator said it, I believe it, that settles it
