Question

The arithmetic mean of a set of 10 numbers is 20. If each number is first multiplied by 2 and then increased by 5, then what is the mean of the new numbers? 

Answer 1

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 =

10

450

=45

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Answer 2

Answer:

45

Step-by-step explanation:

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