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

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

The average age of r boys in a class is a years. If the average age of s of them is b years, them what is the average age of the remaining boys ?

The average age of 12 boys is 15 years and the average age of 18 girls is 12 years .What is the conbined average age of the boys and girls ,taken together ?

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is (a) 1 : 2 (b) 2 : 3 (c) 3 : 4 (d) 3 : 5

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