Q1. The average salary of the entire staff in a office is Rs 120 per month The average salary of officers is Rs 460 and that of non officer is Rs 110 If the number of officer is 15 then find the number of non officer in the office

Q2. The average weight of some students in a class was 60 5 kg When 8 students whose average weight was 65 kg joined the class then the average weight ofall the students increased by 0 9 kg The numberofstudentsin theclass initially was

Q3. Seema s present age is four times her son s present age and four seventh of her father s present age The average of the present age of all three of them is 32 years What is the difference between the Seema s son s present age and Seema s father s present age

Q4. A Mathematics teacher tabulated the marks secured by 35 students of 8th class The average of their marks was 72 If the marks secured by Reema was written as 36 instead of 86 then find the correct average marks up to two decimal places

Q5. In an exam the average was found to be 50 marks After deducting computational errors the marks of the 100 candidates had to be changed from 90 to 60 each and the average came down to 45 marks The total number of candidates who took the exam was