Using 5 different flags, signals of at least 2 flags on a staff number:

Question

Accepted Answer

B. 320

1. Two flag signals give 20 and three give 60.
2. Four give 120 and five give 120.
3. The total is 320.
_Source: syllabus Mathematics, Chapter 7, Permutations and Combinations._

Answer

420

Answer

120

Answer

220

Using 5 different flags, signals of at least 2 flags on a staff number:

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