document.write( "Question 204800: At an annual flower show, 7 different entries are to be arranged in a row. \r
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document.write( "a) How many different arrangements of the entries are possible?
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document.write( "b) If the owners of the 1st, 2nd, and 3rd place entries will be awarded prizes of $100, $50, and $25 respectively, how many ways can the prizes be awarded? \n" );
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Algebra.Com's Answer #154580 by edjones(8007)![]() ![]() You can put this solution on YOUR website! a) \n" ); document.write( "nP = n! \n" ); document.write( "7P = 7! \n" ); document.write( "=7*6*5*4*3*2 \n" ); document.write( "=5040 \n" ); document.write( ". \n" ); document.write( "b) \n" ); document.write( " nCr = n!/[(n-r)!*r!] because arrangement is not important \n" ); document.write( "7C3 \n" ); document.write( "= 7!/(7-3)!*3! \n" ); document.write( " =( 7*6*5*4!)/(4!*3!) \n" ); document.write( "=(7*6*5)/(3*2) \n" ); document.write( "=35 ways \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |