In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes?

A sum of Taka 3000 invested at 4% per annum for a number of years earned Taka 300 interest. What is the time p...

A jar contains black and white marbles. If there are ten marbles in the jar, all of the following could be the...

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56%...

If 4 cows prduce 4 liters of milk in 4 days, how many days does it take for 8 cows to produce 8 liters of milk...

A company employs 15 workers working 44 hours a week to complete a job. If 4 men are ill, how many hours a wee...

A chair originally cost Taka 50.00. The chair was offered for sale at 108% of its cost. After a week the price...