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

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

1. A

14.5

2. B

13.5

3. C

12.5

4. D

13

Register to Get Free Mock Test and Study Material

+91

Verify OTP Code (required)

Solution:

We have

$⇒$    Sum of the observations = 180

Arithmetic mean of new observations = $\frac{180-20-25}{10}=135$

Register to Get Free Mock Test and Study Material

+91

Verify OTP Code (required)