Question
Download Solution PDFDetermine the quantity of different signals that can be created by organizing at least 2 flags in sequence (one below the other) on a vertical staff, if 5 different flags are available?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Available flags = 5
Sequence matters
Concept:
Ways of arranging r things out of n distinct things =
Formula:
Explanation:
At least two flags from 5 flags mean ' 2 flags or 3 flags or 4 flags or 5 flags '.
∴ ways =
= (4)(5) + (3)(4)(5) + (2)(3)(4)(5) + (1)(2)(3)(4)(5)
= 20 + 60 + 120 + 120
= 320
Last updated on Jun 19, 2025
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