one after the other without replacement one after the other without replacement 6x(3/9 x3/8 x3/7) =9/28 3!=6 ways to arrange the three colors (6x5x4)/(6x6x6) = 5 /9 Pr(mn = 12 or mn =24) = 4/4x4 = 1/4 (3;4),(4;3),(6;2),(6;4) cas favorables 4x4 cas possibles D Pr(E,P) = 1/5 x1/5 = 1/25 B