Problem Solving
试题详情
题目：
A certain junior dass has 1,000 students and a certain senior dass 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?
选项:
A、 $$\frac{3}{40,000}$$
B、 $$\frac{1}{3,600}$$
C、 $$\frac{9}{2,000}$$
D、 $$\frac{1}{60}$$
E、 $$\frac{1}{15}$$
答案:
A
