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How many four-digit numbers are possible criteria being that all four digits are odd?
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Important Questions on Permutations and Combinations
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A captain and a vice-captain are to be chosen out of a team of eleven players. How many ways are there to achieve this?
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There are five types of envelopes and four types of stamps in the post office. How many ways are there to buy an envelope and a stamp?
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In how many ways, can Ram choose a vowel and a consonant from the word ALLAHABAD?
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There are three rooms in a motel: one single, one double and one for four persons. How many ways are there to house seven persons in these rooms?
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How many ways are there to choose four cards of different suits and different values from a deck of cards?
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How many new words are possible from the letters of the word PERMUTATION?
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A set of fifteen different words are given. In how many ways, is it possible to choose a subset of not more than five words?
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In how many ways can papers can be arranged if the best and the worst paper never come together?
