How many numbers are there between 100 and 1000 such that at least one of their digits is 6?

A question paper has two parts, A and B, each containing 10 questions. If a student has to choose 8 from part A and 5 fr…

There are six teachers. Out of them two are primary teachers and two are secondary teachers. They are to stand in a row,…

In how many different ways can the letters of the word AUCTION be arranged in such a way that the vowels always come tog…

In how many different ways can the letters of the word DISPLAY be arranged?

A committee of 5 members is to be formed by selecting out of 4 men and 5 women. In how many different ways the committee…

In how many ways can the letters of the word ABACUS be rearranged such that the vowels always appear together?

In the next World cup of cricket there will be 12 teams, divided equally in two groups. Teams of each group will play a …