The average age of 60 boys in a class was calculated as 12 years. It was later realised that the actual age of one of the boys in the class was 12.5 years but it was calculated as 14 years. What is the actual average age of the boys in the class ?

The average age of 54 girls in a class was calculated as 14 yr. It was later realized that the actual age of one of the girls in the class was 10.5 yr but it was calculated as 13yr . What is the average age (round off) of the girls in the class ?

The average age of 33 boys and the class teacher in a class is 14 years. If the class teacher's age is 47 years. What would the average age of only the boys ?

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 15 boys in a class is 11 years 3 months. If A boy of 12 years and 7 months join that class, what will be the average age of the boys in the class?

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 of 80 boys in a class is 15. The average age of a group of 15 boys in the class is 16 and the average age of another 25 boys in the class is 14. What is the average age of the remaining boys in the class? (a) 14 (b) 14.75 (c) 15.25 (d) Cannot be determined (e) None of these