Question

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

Answer 1

the answer is in the photo
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Answer 2

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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