The average age of a class was 15 years. When 5 boys whose average age was 12 years 6 months were admitted in the class, the average was reduced by 6 months. How many students were there in the class originally?

The average age of a class is 21 years. If a student with age 42 years joins the class, then new average age becomes 24 years. How many total students are there in the class?

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 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 weight of the students of a class is 60kg. If eight new students of average weight 64kg join the class,the average weight of the entire class becomes 62kg. How many students were there in the class initially.

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby decreasing the average of the class by 4 years. Find the original strength of the class

The average age of a class is 40 years. 12 new students with an average age of 32 years join the class, there by decreasing the average by 4 years. What is the original strength of the class?

The average age of all the 20 students of a class is 24. The minimum age of a student is 18 and the maximum age of another student in the same class is 30 years. When the two students whose average age was 26 years resticted from the class but later on one of the resticated student was readmitted. Now the average age of the class is:

The average age of 30 students of a class is 30 years.When the average age of class teacher is also included the average age of the whole class increased by 1 year the age of the class teacher is: