document.write( "Question 384654: show all work.....................\r
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document.write( "a disc jockey has 7 songs to play. five are slow songs, and two are fast songs. each song is to be played only once. in how many ways can the disc jockey play 7 songs if\r
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document.write( "the song can be played in any oder\r
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document.write( "the first song must be a slow song and the last song must be a slow song\r
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document.write( "the first two songs must be fast songs \n" );
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Algebra.Com's Answer #272306 by edjones(8007)![]() ![]() You can put this solution on YOUR website! 2 fast and 5 slow songs. \n" ); document.write( "a)7!=5040 ways \n" ); document.write( ". \n" ); document.write( "b) \n" ); document.write( "5P2=20 Permutations of the 1st and last \n" ); document.write( "5!=120 permutation of the middle 5. \n" ); document.write( "20*5!=2400 ways \n" ); document.write( ". \n" ); document.write( "c) 2*5!=240 ways. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |