24.The average age of three boys is x years and that of four others is (x+7) years.The average age of these seven boys is 16 years.Find the value of x

In a school with 600 students,the average age of the boys is 12 years and that of the girls is 11 years.If the average age of the school is 11 years 9 months,then the number of girls in the school is: (a) 150 (b) 250(c) 350(d) 450

In a colony, the average age of the boys is 14 years and the average age of the girls is 17 years. If the average age of the children in the colony is 15 years, find the ratio of number of boys to that of girls.

The average age of the boys in a class is 16 years and that of the girls is 15 years.The average age for the whole class is (a) 15 years (b) 15.5 years ( c) 16 years (d) Cannot be computed with the given information

The average age of three boys is 25 years and their ages are in the ratio 3:5:7 . The age of the youngest boy is :

The average age of seven boys sitting in a row facing North is 26 years. If the average age of the first three boys is 19 years and the average age of the last three boys is 32 years, what is the age of the boy who is sitting in the middle of the row? (a) 24 years (b) 28 years (c) 29 years (d) 31 years (e) None of these

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 average age of three boys is 16 years. If their ages are in the ratio 4:5:7, then the age of youngest boy is

In a class, the number of boys and girls are distinct. The average age of all the student in the class equals the average of the average age of the boys and the average age of the girls. The sum of the average age of the boys and the average age of the girls is 10 years. Find the average age (in years) of the boys of the class