A jar contains 6 black and 2 white balls. If you pick two balls at the same time, what's the probability that one ball is black and one is white?	Pick one
A) 2/7  B) 5/7  C) 4/7  D) 3/15  E) 3/14
P(1st black, 2nd white) = 6/8*2/7 = 12/56;   P(1st white, 2nd black) = 2/8*6/7 = 12/56.   P = 12/56 + 12/56 = 24/112 = 12/56 = 6/28 = 3/14.   Answer: 3/14.
<result>E</result>
A jar contains 6 black and 2 white balls. If you pick two balls at the same time, what's the probability that one ball is black and one is white?