Question 921937
7 Balls: 4R, 3B
A ball is drawn random from the box, its color is noted and is not replaced....
If <u>X represents the number of draws</u> needed to get two red balls, 
determine P(X<3) = P(X = 2) = P(1stR AND 2ndR) = {{{(4/7)(3/6)}}} = 12/42 = 2/7