The average weight of 8 men is increased by 1.5 kg when one of the men, who weight 65 kg is replaced by a new man. The w…

The average of 20 students is 12 years, if the teacher's age is included, average increases by one. The age of the teach…

Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, …

Average age of 6 sons of a family is 8 years. Average age of sons together with their parents is 22 years. If the father…

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

The average score of a cricketer for ten matches is 38.9 runs. If the average for the first six matches is 42, then find…

A car owner buys petrol at Rs. 17, Rs. 19 and Rs. 20 per litre for three consecutive years. Compute the average cost per…

The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining numbers is n…