The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5&de…

The average of two numbers is 6.5 and square root of their product is 6. What are the numbers?

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

If a, b, c, d, e are five consecutive odd numbers, their average is

The average temperature for the first four days of a week is 40.2° C and that of the last four days is 41.3° C. …

A certain factory employed 600 men and 400 women and the average wage was Rs. 25.50 per day. If women got Rs. 5 less tha…

In a class, there are 40 boys and their average age is 16 years. One boy, aged 17 years, leaving the class and another j…

Find the average of first 97 natural numbers.