If the average of 5 numbers is 10, the number which should be added to make the average 12 is-

The average age of a husband and his wife was 23 years at the times of their marriage. After five years they have a one-…

The average of the two-digit numbers, which remain the same when the digits interchange their positions, is-

A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years that…

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weig…

Four years ago, the average age of A and B was 18 years. At present the average age of A, B, and C is 24 years. What wou…

One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/…

A student obtained the following marks in percentage in his semester examination English 50, Maths 65, Statistics 70, Ec…