In a certain class, there are 30 students. The teacher chooses four students at random to complete a project. What is the probability that the top 3 students in the class are among the chosen students?
P (top 3 students are chosen) =
1 - P ( none of the top three are chosen ) =
C(27,4)
1 - ________ =
C(30,4)
130
1 - ____ = [ 203 - 130 ] / 203 = 73/203
203
