AMC 10A 2005 Problem 9

Three tiles are marked \mathrm{X} and two other tiles are marked \mathrm{O}. The five tiles are randomly arranged in a row. What is the probability that the arrangement reads XOXOX?

Answer Choices
A. \dfrac{1}{12}
B. \dfrac{1}{10}
C. \dfrac{1}{6}
D. \dfrac{1}{4}
E. \dfrac{1}{3}