SOLUTION: if the average (arithmetic mean) of a series of numbers is 20, and the sum of these numbers is 160, how many numbers are in the series?
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Question 817194: if the average (arithmetic mean) of a series of numbers is 20, and the sum of these numbers is 160, how many numbers are in the series?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if the average (arithmetic mean) of a series of numbers is 20, and the sum of these numbers is 160, how many numbers are in the series?
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If there are n numbers and their mean is 20, sum/n = 20
sum = 160
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Equation:
20n = 160
n = 8 (# of numbers in the series)
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Cheers,
Stan H.
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