SOLUTION: The average of nine numbers is 40. If 1 is added to the first number, 2 is added to the second number, 3 is added to the third number and so on up to the ninth number, what is the

Question 187310: The average of nine numbers is 40. If 1 is added to the first number, 2 is added to the second number, 3 is added to the third number and so on up to the ninth number, what is the new average?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

If the average of 9 numbers is 40, then the sum of the nine numbers must be 9 times 40 or 360. If you add 1 to the first number, 2 to the second, and so on, then you must be adding:

So the sum is 360 + 45 = 405, and the new average is 405 divided by 9 = 45.

John

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