The mean of the marks scored by 50 students was found to be 39 later on, it was observed that a score was 43 was misread as 23 find the correct mean.

The mean of marks scored by 100 students was found to be 40, later on, it was discovered that a score of 53 was misread as 83. find the correct mean.

The mean of the marks scored by 40 students was found to be 35. Later on it was discovered that a score of 43 was misread as 34. The correct mean is

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean marks of 100 students were found to be 40. Later on it was discovered that a score of 53 was misread as 83. The corrected mean corresponding to the corrected score is: (a) 37.5 (b) 35.6(c)39.7 (d) 38.7

The mean of 20 observations was found to be 65 but later on it was found that 69 was misread as 96 .Find the correct mean.

For a group of 200 students the mean and S.D. of marks obtained by them were found to be 40 and 15 respectively. Later on, it was found that the score 23 was misread as 32. Find the correct mean and correct S.D.