Question

the arithmetic mean of 40 numbers is 65 if each of the numbers is increased by 7 what will be the mean of the numbers ​

Answer 1

Step-by-step explanation:

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Answer 2

THE CORRECT ANSWER IS 72.

GIVEN :

• AM of 40 numbers is 65.
• if each of the numbers is increased by 7.

To find:

The mean of the new numbers.

Explanation:

According to the question the mean of 40 values is 65.

Sum of values = 40 × 65 = 2600.

Each numbers is increased by 7 hence, the new values increased by 7 = 40 × 7 = 280.

New sum of the values = 2600 + 280 = 2880.

AM of the new values = 2880/40 = 72.

Hence, if each value increased by 7 then the AM also increased by 7.

NOTE :

Here mentioned (AM) is denoted as arithmetic mean.