题目内容
收藏
纠错
A box contains 10 pairs of shoes (20 shoes in total). If two shoes are selected at random, what is the probability that they are matching shoes?
-
A$$\frac{1}{190}$$
-
B$$\frac{1}{20}$$
-
C$$\frac{1}{19}$$
-
D$$\frac{1}{10}$$
-
E$$\frac{1}{9}$$
C显示答案