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Counting Question?
If you are given 4 identical red flags and 2 identical blue fags, how many different signals can be formed by hanging these 6 flags in a CIRCLE.
For those of you who don't know, hanging it in a circle is different. For example, arranging 6 people around a circular table is 5! instead of 6!.
In the case of this question, I did 5! / (4! * 2!) which is apparently wrong.
How do I do this question?
Thanks!
The answer is 3.
This type of problem is too specialized to do using a standard formula, so you attack it using basics.
Do it by considering where the 2 blue flags end up.
The two blue flags can be either:
-- next to each other,
--separated by 1 red flag,
--or at opposite ends (separated by 2 red flags)
There are no other possibilities