Age of 5 boys is 13,15,11,9 and 8. find their mean age

The age (in years) of 10 boys are given below.Find their mean age: 12,14,15,10,6,8,5,18,13,19

The average age of three boys is 25 years and their af age in the proportion 3:5:7. The age of the youngest boy is 9backslash years b.15 years c.18backslash years d.21 years

The average age of three boys is 15yr . If the ratio of their ages is 3:5:7 , what is the age of the oldest boy ?

The ages (in years) of 50 students of a class in a school are given below: Age (in years): 14 15 16 17 18 Numbers of students: 15 14 10 8 3 Find the mean age.

The ages (in years) of 50 students of a class in a school are given below: Age (in years): 14 15 16 17 18 Numbers of students: 15 14 10 8 3 Find the mean age.

The ratio of the present age of A and the age of B 4 years ago is 7 : 8. 8 years hence, the ratio of age of A to that of B is 9 : 11. Find the present age of B.

If the mean age of combined group of boys and girls is 18 years and the mean of age of boys is 20 and that of girls is 16, then what is the percentage of boys in the group ?