A room contains 200 people, 25% of whom are graduates. A group of people, 30% of whom are graduates, leave the room. Of the remaining people, 10% are graduates. How many people did leave the room?

How many tiles, each a square tile of 2 inch sides, are needed to cover a rectangle floor of 4 feet long and 6...

There are three different roads from Shah Bag to Farm Gate and 4 different roads from Farm Gate to Banani. How...

You are to arrange 36 identical chairs in rows such that there is same number of chairs in each row. Each row...

Mr. Rahman is insured completely for Tk. 50,000 of damages to his machinery. For any damage above Tk. 50,000 t...

The probability that a student will graduate with honors and get a good job is 0.09 whereas the probability th...

A South American visitor was confused to read that the next day's temperature would be 77 degree Fahrenheit. T...