There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A…

In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is fiv…

The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is…

If 25a + 25b = 115, what is the average of a and b?

A man spends his three months income in four month time. If his monthly income is Rs. 1000 then his annual savings is ?

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

In an examination, a pupil’s average mark was 63 per paper. If he had obtained 20 more marks for his Geography pap…

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the average marks of…