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In how many different ways can the letters of the word QUANTITY be arranged so that the vowels always come together?
How many different 10-letter words (with or without meaning) can be formed using all the letters of the word "TEMPTATION"?
History books are always together and also Geography books are always together?
How many words can be formed with the letter of the word ‘NUMBER’ when alll vowels are never together?
Among a set of 6 black balls and 3 white balls, how many selections of 5 balls can be made such that at least 3 of them are black balls?
In how many different ways can the letters of the word "AIRSTRIKE" be arranged if all the vowels must always be grouped together?
What will be the number of permutations of n different things, taken r at a time, where repeatition is allowed?
In an election, a voter can vote for any number of candidates not exceeding the number to be elected. There are 7 candidates and 4 members to be elected...
A person has 12 friends out of which 7 are relatives. In how many ways can he invite 6 friends such that at least 4 of them are relatives?
In How many ways can a student choose a program of 5 courses, if 9 courses are available and 2 courses are compulsory for every student?
