Question

The arithmetic mean of a set of 10 numbers is 20. If each number is multiplied by 2 , what is the new mean of set​

Answer 1

Answer:

Mean of 10 number is 20.

Sum of 10 numbers = 200

When each number is multiplied by 2 and 5 is added to each number, new sum = 2×200+10×5=450

Now, new mean = 450/10

=45

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Answer 2

Explanation:

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