How many signals can be made by hoisting 2 blue, 2 red and 5 yellow fl – InterviewSolution

1.	How many signals can be made by hoisting 2 blue, 2 red and 5 yellow flags on a pole at the same time?
Answer» The number of signals = \(\frac{9!}{2!2!5!}\) = \(\frac{9\times8\times7\times6\times5\times4\times3\times2\times1}{2\times2\times5\times4\times3\times2\times1}\) = 756.

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