document.write( "Question 1052489: I tried much in this problem but I didn't get my answer correct.\r
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document.write( "The question is---\r
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document.write( "A person draws two cards successively without replacement from a pack of 52 playing cards.He tells that both cards are aces,then the probability that both cards are aces if there are 60% chances that he speaks truth-----
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Algebra.Com's Answer #667843 by Theo(13342)![]() ![]() You can put this solution on YOUR website! the probability of drawing an ace out of the deck the first time is 4/52.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the probability of drawing an ace out of the deck the second time without replacement is 3/51.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the assumption is that you got the ace the first time and there are only 3 aces left out of 51 cards left.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so the probability of drawing two aces out of the deck without replacement is 4/52 * 3/51.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if the person speaks the truth 60% of the time, than he actually has two aces 60% of the time.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if the person lies 40% of the time, than he actually doesn't have two aces 40% of the time.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so, 60% of the time, the probability that he actually has two aces is 4/52 * 3/51, and 40% of the time, the probability that he actually has two aces is 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the overall probability that he actually has 2 aces is therefore .60 * 4/52 * 3/51 + .40 * 0 which is equal to .60 * 4/52 * 3/51 which is equal to .0027149321.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "in fractional form, this is equal to 3/1105.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this is what i think is happening.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "try it out and see if it's right.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |