There are four bus routes between and and three bus routes between and . A man can travel round trip in number of ways by bus from to via . If he does not want to use a bus route more than once, in how many ways can he make round trip?
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There are four bus routes between A and B and three bus routes between B and C. A man can travel round trip in number of ways by bus from A to C via B. If he does not want to use a bus route more than once, in how many ways can he make round trip? (A) 72 (B) 144 (C) 14 (D) 19
Combinatorics and counting has come up 24 times in 5 exams since 2009.
This question is on Permutations and combinations, part of Combinatorics and counting in Mathematics.
Counting arrangements and selections, with and without restrictions.
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Question from the JNU SSS 2010 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.