Difference between revisions of "2003 AMC 8 Problems/Problem 18"

(Created page with "There are three people who are only friends with each other who won't be invited. Also, there are two people who are friends of friends of friends who won't be invited, to give u...")
 
Line 1: Line 1:
There are three people who are only friends with each other who won't be invited. Also, there are two people who are friends of friends of friends who won't be invited, to give us a total of (C) - 5 people.
+
There are 3 people who are friends with only each other who won't be invited, plus 1 person who has no friends, and 2 people who are friends of friends of friends who won't be invited. So the answer is D (6).

Revision as of 14:29, 10 July 2012

There are 3 people who are friends with only each other who won't be invited, plus 1 person who has no friends, and 2 people who are friends of friends of friends who won't be invited. So the answer is D (6).