题目信息
A certain junior class has 1,000 students and a certain senior class has 800 students. Among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 senior. If 1 student is to be selected at random from each class, what is the probability that the 2 students selected will be a sibling pair?
A:$$\frac{3}{40,000}$$
B:$$\frac{1}{3,600}$$
C:$$\frac{9}{2,000}$$
D:$$\frac{1}{60}$$
E:$$\frac{1}{15}$$
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正确答案：
A:$$\frac{3}{40,000}$$
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