The average weight of 15 students in a class increases by 1.5 kg when one of the students weighing 40 kg is replaced by …

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. Wha…

The average of the first 100 positive integers is-

The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.…

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 salary of all the workers in a workshop is Rs. 8,000. The average salary of 7 technicians is Rs. 12,000 and …

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of…

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A…