How many signals can be made by hoisting 5 flags of different colours ?

How many different signals can be generated from 6 flags of different colours if each signal makes use of all the flags at a time, placed one below the other?

From 4 mangoes, 5 oranges and 6 apples, how many selections of fruits can be made by taking at least one of them ?

From 2 mangoes, 3 oranges and 4 apples, how many selections of fruits can be made by taking : at least one of them?

From 2 mangoes, 3 oranges and 4 apples, how many selections of fruits can be made by taking : at least one of each kind ?

How many selections of 4 books can be made from 8 different-books ?

How many different signal can be giving using any number of flag from flag 4 of the different colour

Find the number of different signals that can be made by arranging at least three flags in order on a vertical pole, if 6 different flags are available.

In how many ways 5 different balls can be arranged into 3 different boxes so that no box remainns empty?

How many different words can be formed by using the letters of the word 'ALLAHABAD' In how many of these do the vowels occupy even positions.

How many different words can be formed by using the letters of the word 'ALLAHABAD' In how many of these, the two L's do not come together?