A school has only four classes that contain 10, 20, 30 and 40 students respectively. The pass percentage of these classe…

Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of …

The marks of six boys in a group are 48, 59, 87, 37, 78 and 57. What are the average marks of all six boys?

If the average temperature of first four days of the week was 39°C and the average temperature of the week was 40&de…

The average of the first five multiples of 3 is-

The average of 8 numbers is 20. The average of first two numbers is $$15\frac{1}{2}$$ and that of the next three is $$21…

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 1…

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…