A box of fruit contains 20 apples, 10 oranges, and no other fruit. When a fruit is randomly chosen from the box, what is the probability that the fruit is an orange?
(A) $\frac{1}{10}$
(B) $\frac{1}{20}$
(C) $\frac{1}{30}$
(D) $\frac{1}{3}$
(E) $\frac{2}{3}$
Each of the 30 pieces of fruit in the box is equally likely to be chosen. Since there are 10 oranges in the box, then the probability that the chosen fruit is an orange is $\frac{10}{30}$ or $\frac{1}{3}$.

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