Posted by Anonymous on Friday, February 15, 2013 at 2:06am.
BRILLIANT SCHOLARS ROCKS !
Let's think of the question this way:
Suppose you sit the 6 people around a round table.
Then everybody gives a present to the person on their left.
So everybody has given a present and received a present.
If we change the "arrangement" of the 6 people around the table, we have a different Secret Santa arrangement.
So all we have to do is calculate the number of ways we can sit 6 people around a round table, (or let them form a circle)
that would be 6!/6 = 5! = 120
(I divided by 6. Here is why. If everybody got up and moved one to the right, the order would not change, and we can do that 6 times)
Related Questions
Advanced Algebra - The world's population is over 6 billion people. A ...
English - Are the following two sentences possible? Is "disguise" ...
English Lit - I need help on proof reading this story. Christmas should be a ...
statistics - I am having a hard time trying to figure out this question. Any ...
English - I forgot to include these very last sentence. I really hope you can ...
english - beautiful china figures Are you look for an ideal gift for a friend or...
English - Can you check these 6 paragraphs, please? 1) During my Christmas ...
English - 1. She likes playing with her dog. 2. She likes playing with a puppy. ...
Symbolism - 1. What does the color white symbolize? Answer: Purity and innocence...
English - As agreed, I'm posting you the sentencens I'm still not sure ...
For Further Reading
