Arithmetic Ability
Permutations and Combinations

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Q.

The number of signals that can be generated by using 5 differently coloured flags, when any number of them may be hoisted at a time is:

View Answer

Correct choice: C

Explanation:

Required number of signals = 5P1 + 5P2 + 5P3 + 5P4 + 5P5 = 5 + 20 + 60 + 120 + 120 = 325
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