The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

Question

The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is (A) 14.5 (B) 13.5 (C) 12.5 (D) 13

Tardigrade Admin · Accepted Answer

AM =( text Sum of all observation / text Total number of observations ).

Q. The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

14.5

13.5

12.5

13

$A M = \frac{Sum of all observation}{Total number of observations}$ .

Q. The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

14.5

13.5

12.5

13

AM= Total number of observations Sum of all observation ​.

$A M = \frac{Sum of all observation}{Total number of observations}$ .