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If we know the average and the total sum...

If we know the average and the total sum,total number. Write the relation connecting them. If the average is 18 and the total sum is 126 then find the total number?

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Suppose that total number is `(N)`, its average is `A` and the total. sum is `T`. Then `(N)=((T))/((A))` The total number `=(T)/(A)=(126)/(18)=7`
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