The average weight of first 11 persons among 12 persons is 95 kg. The weight of 12<sup>th</sup> person is 33…

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then …

The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What i…

A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must …

Out of 10 teachers of a school, on teacher retires and in place of him a new teacher 25 years old joins. As a result of …

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

The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. The a…

The average weight of 3 men A, B, and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If an…