A certain business school has 500 students, and the law school at the same university has 800 students. Among these students, there are 30 sibling pairs consisting of 1 business student and 1 law student. If 1 student is selected at random from both schools, what is the probability that a sibling pair is selected?	Choose the correct choice from the following answers: A) 3/40000 B) 3/20000 C) 3/4000 D) 9/400 E) 6/130
probability of selecting 1 student from Harvard's Business School---1/500   probability of selecting 1 student from Harvard's Law School---------1/800   probability that these two students are siblings----(1/500 * 1/800)   since there are 30 siblings, hence (1/500 * 1/800)*30.   3/40000   3/40000nswer:3/40000
<result>A</result>
A certain business school has 500 students, and the law school at the same university has 800 students. Among these students, there are 30 sibling pairs consisting of 1 business student and 1 law student. If 1 student is selected at random from both schools, what is the probability that a sibling pair is selected?