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| Math Central | Quandaries & Queries |
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Question from rizza, a parent: The average of 9 numbers is 45. If 90 and 88 are added to the set of numbers. What will be the resulting average? |
H Rizza,
I can get you started.
Suppose the sum of the 9 numbers is $S$ then
\[\frac{S}{9} = 45.\]
What is $S?$
Penny
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