116. 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) 3/4000 (B) 1/3600 (C) 9/2000 (D) 1/60 (E) 1/15
答案与解析回复可见哦~
|