Question : The average of nine observations was found to be 35. Later on, it was detected that observation 81 was misread as 18. The correct average of the observations is:

Question : The average of 20 numbers is calculated as 35. It is discovered later on that while calculating the average, one number, 85, was misread as 45. The correct average is:

Question : The mean of 100 items was 46. Later on, it was discovered that item 16 was misread as 61 and another item, 43, was misread as 34. It was also found that the number of items was 90 and not 100. Then, what is the correct mean?

Question : The average of 11 numbers is 36, whereas the average of 9 of them is 34. If the remaining two numbers are in the ratio of 2 : 3, find the value of the smaller number (between the remaining two numbers).

Question : The average of the marks of 17 students in an examination was calculated as 71. However, it was later found that the mark of one student had been wrongly entered as 65 instead of 56 and another as 24 instead of 50. The correct average is: