1
$\begingroup$

In how many ways 3 flags of colors black, purple & yellow can be arranged at the corners of an equilateral triangle?

  • 6
    Welcome to MathSE. I see that this is your first question. So I wanted to let you know a few things about MathSE. We like to know the sources of questions. We also like to know what you've tried on a problem or what your thoughts are, so that the answer does not re-invent the wheel. These sort of pleasantries usually result in more and better answers. Thank you!2011-11-23
  • 0
    Hint: you are finding the number of $ordered$ arrangements of three $distinct$ objects.2011-11-23
  • 0
    I can see a considerable number of possible interpretations of this question. For a start, it could be three distinguisable flags (one black, one purple, and one yellow) or three indistinguishable tricolour flags. Then there may or may not be an implied constraint that each corner has precisely one flag positioned at it. Finally the corners or the triangle may or may not be distinguishable.2011-11-23

2 Answers 2