Bryn Posted May 15, 2004 Share Posted May 15, 2004 A man draws one card at random from a complete pack of 52 cards, replaces it and then draws another card at random from the pack. Calculate the probibility that eaxactly one of the cards is a Queen. I evaluated P(Q n Q') = 1/13 * 12/13 (they are independant events) =12/169 The answer according to the book is 24/169 . Help! Link to comment Share on other sites More sharing options...
Bryn Posted May 15, 2004 Author Share Posted May 15, 2004 nevermind, got it now. Link to comment Share on other sites More sharing options...
Dave Posted May 16, 2004 Share Posted May 16, 2004 Just for the sake of showing the proof, either you get a queen first, or you get some other card then a queen. You just have to put the values in for the different probabilities. Link to comment Share on other sites More sharing options...
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