A basket contains 3 blue, 5 black and 3 red balls. If 3 balls are drawn at random what is the probability that all are black?
Choose the correct choice from the following answers.
A) 2/33	B) 3/33	C) 33/2	D) 8/33	E) 9/33
I suppose case is without replacement.   Probability for first to be black = 5/11   Probability for second to be black =4/10   Probability for third to be black = 3/9   Hence   Probability for all to be black = 5/11×4/10×3/9   = 2/33   2/33nswer is 2/33
<result>A</result>
A basket contains 3 blue, 5 black and 3 red balls. If 3 balls are drawn at random what is the probability that all are black?