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Determine the number of ways of selecting one or more letters from the letters BBBBBB?(a) 6(b) 73(c) 23(d) 56I had been asked this question in semester exam.I need to ask this question from Counting in chapter Counting of Discrete Mathematics

Answer»

Right choice is (a) 6

To EXPLAIN I would say: The number of ways of selecting one ‘B’s = 1, selecting TWO ‘B’s = 1, selecting three ‘B’s = 1, selecting four ‘B’s = 1, selecting five ‘B’s = 1 and selecting six ‘B’s = 1. HENCE, the required number of ways = 6.



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