In a city , 40% of the people are illiterate and 60% are poor. Among the rich , 10% are illiterate. What percentage of the poor population is illiterate?

A number is decreased by 10% and then increased by 10% . The number so obtained is 10 less than the original n...

In a fraction , if numerator is increased by 40% and denominator is increased by 80% then what fraction of the...

In an examination , 34% of the students failed in Mathematics and 42% failed in English . If 20% of the studen...

A sum invested at 5% simple interest per annum grows to Tk. 504 in 4 years The same amount at 10% simple inter...

A person borrows Tk. 5000 for 2 years at 4% p.a. simple interest . He immediately lends to another person at

A contractor employed 30 men to do a piece of work in 38 days. After 25 days , he employed 5 men more and the...