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Question 519516:
Found 2 solutions by Edwin McCravy, pwday:
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
a reduced deck of 4 Jacks and 4 Queens is shuffled. if two cards are picked at random, what is the probability that the second is a queen, given that the first is a jack?
Since we know that the first card is a jack, then we know that the second card
was from a deck that did not contain it. It was from a 7-card deck that
contained only 3 jacks and 4 queens, so the probability that it is a queen is 4
out of 7 or 4/7.

Edwin
Answer by pwday(1)   (Show Source): You can put this solution on YOUR website!
5(x+3y)-[7-3(x+y)]
-5(x+9y)+2(6x+y)
2x2+15+-7x-5-7x-x2
1/6(12x2+24x+18)