## Prealgebra (7th Edition)

$\frac{1}{3}$
There are 6 possible outcomes of tossing a single die: 1, 2, 3, 4, 5, 6. "1 or 6" represent 2 of the 6 possible outcomes, so the probability is 2 out of 6. $\frac{2}{6}=\frac{2\div 2}{6\div 2}=\frac{1}{3}$