<p>Why can't we use permutations for it ? 6x5?</p>
<p>It’s not a permutation problem. The order of the bowties doesn’t matter. Use combination instead.</p>
<p>Combination, not Permutation. Order doesn’t matter, it wouldn’t make sense if one combination was red and purple, for example, and another was purple and red, since they would mean the same thing in this situation.</p>
<p>mmm could you think of it as a permutation then divide by 2, since there are 2 ways to arrnge it bascially?</p>