Home
Class 7
MATHS
The arithmetic mean of 13 observations i...

The arithmetic mean of 13 observations is 60. If one of the observation 50 is deleted and another observation 63 is included. Find the new arithmetic mean. The following steps are involved in solving the above problem. Arrange them in sequential order.
(A) New sum of observations `=780-50+63=793`
(B) The sum of the observation `=13xx60=780`
(C) `:.` New arithmetic mean `=793/13`
(D) The required mean `=61`

Promotional Banner

Similar Questions

Explore conceptually related problems

The arithmetic mean of 10 observations is 45. If one of the obsservations, 54, is deleted, then find the mean of the remaining observations.

The mean of 16 observations is 16 . If one observation 16 is deleted and three observations 5 , 5 and 6 are included , then find the mean of the final observations .

The mean of 16 observations is 16 . If one observation 16 is deleted and three observations 5 , 5 and 6 are included , then find the mean of the final observations .

The mean of 10 observation is 15. If one observation 15 is added, then find the new mean.

The mean of 50 observations is 36. If two observations 30 and 42 are deleted, then mean of the remaining observations is

Arithmetic mean =( sum of all observations)/(Number of observations)