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Five people, including Asha and Babu, stand in a queue. In how many queues is Asha somewhere ahead of Babu (not necessarily just before)?

Competition practicePermutations & Combinations
  • A120
  • B24
  • C60
  • D48

Step-by-Step Solution

All queues: . Swapping Asha and Babu pairs up the queues, and in exactly one of each pair Asha is ahead. So . (24 would force them to stand together.)
Answer: C) 60

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