The mean of 5 observations is 7. Later on, it was found that two observations 4 and 8 were wrongly taken instead of 5 and 9. Find the corrected mean.

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.

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.

The mean of 50 numbers is 30. Later it was discovers that two entries were wrongly entered as 82 and 13 instead of 28 and 31. Find the correct mean.

Mean of 20 observations is 15.5. Later on it was found that the observation 24 was taken as 42. The correct mean is-

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 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected mean is

The average of 18 observations Is recorded as 124. Later it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82. Find the correct average of the 18 observations.