The mean of 20 observations is 15. On Ch...

The mean of 20 observations is 15. On Checking it was found that two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 4, then the correct means is

A

15

B

15.15

C

16.15

D

17

Verified by Experts

The correct Answer is:

B

Similar Questions

Explore conceptually related problems

The mean of 25 observations is 72. It was detected that one observation 53 was wrongly copied as 78. Find the correct mean.

The mean of 100 observations is 40. It is found that an observation 53 was misread as 83. Find the correct mean.

The mean of 15 observations is 32. Find the resulting mean, if each observation is decreased by 7

Mean of 100 observation is 45. It was later found that two observations 19 and 31 were incorrectly recorded as 91 and 13. Then the correct means is

The mean of 15 observations is 32. Find the resulting mean, if each observation is decreased by 20%

If the mean of 15 observations is 16, find the sum of the 15 observations.

The mean of 15 observations is 32. Find the resulting mean, if each observation is increased by 3

The mean of 5 observations is 8 , Find the sum of the 5 observations.

The mean of 100 observations was found to be 30. If two observations were wrongly taken as 32 and 12 instead of 23 and 11, find the correct mean.