The average of the three numbers x, y and z is 45. x is greater than the average of y and z by 9. The average of y and z…

A school has only four classes that contain 10, 20, 30 and 40 students respectively. The pass percentage of these classe…

The average of the ages of Sumit, Krishna and Rishabh is 43 and the average of the ages of Sumit, Rishabh and Rohit is 4…

The average of six numbers is 20. If one number is removed, the average becomes 15. What is the number removed ?

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, S…

A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 a…

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then…

The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs. 90 per day. During the f…