Sam ranked ninth from the top and thirty -eight from the bottom in a class. How many student are there in the class?

Idark buys 80 kg sugar at Taka 40 per kg and 40 kg rice at Taka 50 per kg. At what price approximately in taka...

A rectangular field will be fenced on three sides leaving a side of 20 feet uncovered . If the area of the fil...

The selling price of 15 items equals the cost of 20 items. What is the percentage of profit earned by the sell...

The length of a rectangular room is double of its breath. If the area is 512 square inches, what is the perime...

A class had 30 students. The class needs to select 3 represntatives. In how many ways can this be done?

In a group of 15,7 have studied Latin, 8 have studied Greek and 3 have not studied either. How many of these s...