Q1. The average salary per head of all the workers in a company is Rs 95 The average salary of 15 officers Rs 525 and the average salary per head of rest is Rs 85 Find the total number of workers in the workshop

Q2. In three annual examinations of which the aggregate marks of each was 500 a student secured average marks 45 and 55 in the first and the second yearly examinations respectively To secure 60 average total marks it is necessary for him in third yearly

Q3. Find out the average of the given numbers 356 449 51 652 533 105 122

Q4. The average of first three numbers is five times of the fourth number If the average of all the four numbers is 20 Find the 4th number

Q5. Out of given 5 numbers the average of first four is 26 and of the last 4 is 25 What will be the difference between the first and the last number