![]() However, the selection of A and B gives 2 different words i.e. The 2-letter words that can be formed from 3 letters A, B, and C are:Ĭan you observe that in combination, the selection of A and B gives only 1 team i.e. Let us understand the concept of permutation by solving example 2-įrom 3 letters, A, B, and C, how many 2-letter words can be formed? Keyword approach to identify Permutation Questions The number of ways to select ‘r’ things among ‘n’ things = nCr.Keep an eye on the important keywords like-select, choose, combination in the question stem.Thus, the total ways to select 7 stocks = 10 × 6 × 3 = 180 ways. ![]()
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