The average age of A, B, C, D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42…

Average of n numbers is a. The first number is increased by 2, second one is increased by 4, the third one is increased …

The arithmetic mean of the following numbers : 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6 and 7, 7, 7…

The average temperature on Tuesday, Wednesday, and Thursday was 41 degrees, and on Wednesday, Thursday and Friday was 40…

The average weight of 15 students in a class increases by 1.5 kg when one of the students weighing 40 kg is replaced by …

There are two sections A and B of a class, consisting of 36 and 44 students' respectively. If the average weight of sect…

The average age of all the students of a class is 18 years. The average age of boys of the class is 20 years and that of…

The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is