Ali has 2 school bags, 3 tiffin boxes and 2 water bottles. In how many ways can he carry these items choosing one each.

In how many ways can 3 letters be posted in 2 letter boxes?

In how many ways can 4 letters be posted in 3 letter boxes?

In how many ways can 4 letters be posted in 3 letter boxes?

A servant has to post 5 letters and there are 4 letter boxes. In how many waysy can he post the letters?

A child has 6 pockets. In how many ways can he put 5 marbles in his pocket?

A zoo has 25 zebras, 14 girrafes, 16 lions and 2 tigers. In how many ways can a tourist visit these animals so that he must see at least one tiger.

Ramesh has 6 friends. In how many ways can he invite one or more of them at a dinner

A bag contains 9 yellow balls, 3 white balls and 4 red balls. In how many ways can two balls be drawn from the bag?