The age of 5 children is 13, 15, 11,9 and 8 years respectively. Find their average age.

The average age of 8 children of a family is 12 year. If age of 7 children are 12, 8, 14, 11, 9, 13 and 15 years respeatively. The age of 8th child is?

The average ages of parents and two children are 30 years and 8 years respectively . The average age of the famliy is . A.16 years . B . 19 Years C. 18 years . D. 20 Years.

Mr. Joe’s family consists of six people-himself, his wife and their four children. It is known that the average age of the family immediately after the birth of the first, second, third and fourth child was 16, 15, 16 and 15 respectively. Find the age of Mr. Joe’s eldest son if the present average age of the entire family is 16 years. (a) 8 years (b) 12 years (c) 15 years (d) 16 years

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

There are 48 students in a class with the age of one of the students being twice that of the age of another. If these two students are replaced by two others whose ages are 16 years and 11 years respectively, the average age of the class increases by 1.5 month. Find the age of the younger of the two students.

The average ages of (P,Q),(Q,R),(R,P) are 13,14 and 12 years respectively. What is the age of Q ?

The average ages of boys and girls in a class is 14.5 years and 15 years respectively. If the ratio of the number of boys and girls is 2 : 3, then what is the average age(in years) of all students in the class?

The average age of 8 children of a family is 12 yr. If the age of 7 children are 12,18,14,11,9,13 and 5 yr, then the age of the 8th child will be

In a group of 150 people , (2)/(5) are men, (1)/(3) are women and the rest are children . The average age of the women is (4)/(5) of the average age of the men . The average age of the children is (1)/(5) of the average age of the men . If the average age of the men is 50 years, then the average age of all the people in the group is :