Q1. The mean of 100 observations was calculated as 40 It was found later that one of the observations was misread as 83 instead of 53 The correct mean is

Q2. There were 46 students in a Boys hostel Due to the admission of eight new students the expenses of the hostel mess were increased by Rs 42 per day while the average expenditure per head diminished by Rs 1 What was the original expenditure of the hostel mess

Q3. The average weight of 18 students in a class is 52 5 kg and that of the remaining 6 students is 43 25 kg Find the average weights of all the students in the class

Q4. The average of five consecutive numbers is n If the next two consecutive numbers are also included the average of the seven numbers will

Q5. In English exam the average of Class A was found to be x marks After deducting a computational error the average marks of 100 candidates got reduced from 74 to 54 The average thus came down by 25 marks The total numbers of candidates who took the English exam were