2020 AMC 12B Problems/Problem 15
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Problem
There are 
people standing equally spaced around a circle. Each person knows exactly 
of the other 
people: the 
people standing next to her or him,as well as the person directly across the circle. How many ways are there for the people to split up into 5
(A) 11$$ (Error compiling LaTeX. Unknown error_msg)(B) 12$$ (Error compiling LaTeX. Unknown error_msg)(C) 13$$ (Error compiling LaTeX. Unknown error_msg)(D) 14$$ (Error compiling LaTeX. Unknown error_msg)(E) 15$
