The average age of a group of `8` persons was `14` years.A person with age `28` years left the group and a new person with age `16` years joined the group.Find the new average age of the group.

The average (arithmetic mean) age of the people in a certain group was 35 years before one of the members left the group and was replaced by someone who is 12 years older than the person who left. If the average age of the group is now 37 years, how many people are in the group?

A person with blood group A has

IN an aging person ,there is a

Blood group A person can

The mean age of a combined group of men and women is 25 years. If the mean age of the group of men is 26 years and that of group that of women is 21 years, then find the percentage of men and women in the group.

The sum of the ages of father and his son is 45 years . 5 years ago the products of their ages was 124. Find the present ages .

The mean age of a combined group of men and women is 30 years. If the means of the age of men and women are respectively 32 and 27, then the percentage of women in the group is

If the average life of a person is taken as 100 s the age of the universe on this scale is of the order

The sum of ages of father and his son is 75 years. If the age of the son is 25 years, find the age of the father.

A man is 24 years older than his son. In 2 years, his age will be twice the age of his son. Find their present ages.