Given 4 flags of different colours , how many different signals can be – InterviewSolution

1.	Given 4 flags of different colours , how many different signals can be generated, if a signal requires the use of 2 flags one below the other?[By default, repetition is not allowed unless it is said in the question.]
Answer» Given 4 flags of different colours , how many different signals can be generated, if a signal requires the use of 2 flags one below the other?[By default, repetition is not allowed unless it is said in the question.]

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