The average age of 8 men is increased by 4 years when one of them of age 30 years is replaced by a new man .what is the age of new man ?
The average age of 45 persons is decreased by 1/9 years . when one of them of age 60 years is replaced by a new corner . what is the age of new corner?
The average value of 6 men is 32 years which is increased by 1 year when a new man joins the group.Thwn what is the age of new man?
The average value of 20 teachers is 45 years which is decreased by 6/7 year when a new student joins the group.Then what is the age of that student?
The average age of 10 girls in a hostel is 19 years. But one girl left the hostel and the average age is increased by 1/2 years . Then find the age of the girl who left the hostel.