Difference between revisions of "2020 AMC 12B Problems/Problem 15"

Latest revision as of 20:15, 12 February 2020

Redirect to:

@@ Line 1: / Line 1: @@
-==Problem==
+#REDIRECT [[2020 AMC 10B Problems/Problem 17]]
-There are <math>10</math> people standing equally spaced around a circle. Each person knows exactly <math>3</math> of the other <math>9</math> people: the <math>2</math> people standing next to her or him,as well as the person directly across the circle. How many ways are there for the <math>10</math> people to split up into <math>5</math> pairs so that the members of each pair know each other?
-<math>(A) 11</math> <math>(B) 12</math> <math>(C) 13</math> <math>(D) 14</math> <math>(E)  15</math>