The number of permutation of n thing taking r at a time is denoted by and it is defined under : The arrangements made by taking some or all elements out of a group in a particular manner are called permutations.įor example, in how many way can the letters word ENGLISH be arranged, so that vowels never come together? For example, selecting a team of 11 players out of 20 players. Permutations and Combinations are arrangements or selections of objects out of groups.
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