document.write( "Question 1104726: A politician is about to give a campaign speech and is holding a stack of eight cue cards, of which the first 3 are the most important. Just before the speech, he drops all of the cards and picks them up in a random order. What is the probability that cards #1, #2, and #3 are still in order on the top of the stack? \n" ); document.write( "
Algebra.Com's Answer #720209 by ikleyn(52915) You can put this solution on YOUR website! . \n" ); document.write( " \r\n" ); document.write( "In all, there are 8! permutations of 8 cards.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Of them, the \"fortunate\" permutations are those that have first three cards as #1, #2 and #3; the rest 5 of the cards may go in an arbitrary order.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Therefore, the probability under the question is\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |