The arithmetic mean of 15 numbers is 41.4. Then the sum of these numbers is-

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…

The average height of 35 girls in a class was calculated as 160 cm. It was later found that the height of one of the gir…

There are 50 students in a class. Their average weight is 45 kg. When one student leaves the class the average weight re…

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then…

The average of x numbers is y<sup>2</sup> and the average of y numbers is x<sup>2</sup>. So, th…

Find the average of all the numbers between 6 and 34 which are divisible by 5 -

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