Question

Arithmetic mean of a series is 15 and if 5 is added in all the items of series the new arithmetic mean will be ?

Answer 1

Given:

The arithmetic mean of a series = 15

Added number in each term = 5

Find:

New arithmetic mean:

Property of arithmetic mean:

If any number will add or subtract from all the terms in the series, the arithmetic mean will increase or decrees by the same number.

Calculation of new arithmetic mean:

New arithmetic mean = Arithmetic mean of a series + Added number in each term

New arithmetic mean = 15 + 5

New arithmetic mean = 20

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