The average annual income (in Rs.) of certain agricultural workers is S and that of other workers is T. The number of ag…

A batsman makes a score of 84 runs in the 21<sup>st</sup> inning and thus increases his average by 2 runs. H…

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…

A student finds the average of ten 2 digits numbers. While copying numbers, by mistake, he writes in number with its dig…

The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the manager whose salary w…

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

The average of the first five multiples of 9 is:

The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 …