GAUSS8 2003 Problem 20

The letters G,A,U,S, and S are written on five tiles, one letter per tile. If Amy selects two tiles at random, what is the probability she gets two S's?

Answer Choices
A. \frac35
B. \frac25
C. \frac18
D. \frac{1}{10}
E. \frac{1}{20}