The average weight of a group of eight people increased by 2.5 kg when a person weighing 80 kg j...

The average weight of 8 people increases by 2.5 kg when a new person comes in place of one of them weighing 75 kg. What is the weight of the new person?

The average weight of 8 persons increases by 1.5 kg. If a person weighing 65 kg is replaced by a new person, what could be the weight of the new persons?

The average weight of a group of 22 students increases by 1 kg when the weight of the teacher is also included. If the initial average weight of the group of 22 students was 31 kg, then what is the weight of the teacher?

The average weight of 8 persons is increased by 2.5 kg. When one of them, whose weight is 56 kg is replaced by a new man. The weight of the new man is-

The average weight of 5 men is decreased by 3 kg when one of them weighing 150 kg is replaced by another person. This new person is again replaced by another person whose weight is 30 kg lower than the person he replaced. What is the overall change in the average due to this dual change?