Hi

8 1st year students among a group of 20 students registered for the statistic course. 

5 are randomly selected from the group. 

20C5 = 15,504    |nCx = 

represents the total ways of selecting a group of 5 among the 20



 P(exactly 2 of the selected students are among the 8 1st-year students)

  P = 8C2*12C3/20C5 = 28*220/15,504 = 6160/15,504 = .3973



 

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