Question

The mean of 20 number is 18.if 3 is added to each of the first ten number then find the mean of the new set of 20 numbers

Answer 1

Hi there!
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What is Mean?

The average of a given set of numbers is called the Arithmetic mean, or simply the mean, of the given numbers.

Mean = $\frac{Sum \: of \: observations } {Number \: of \: observations }$

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