document.write( "Question 1193917: Lucinda goes to the local pizzeria for dinner with a group of friends. The menu offers 4 types of soup, 5 main meals, 6 desserts and 3 different types of drinks. Lucinda will order 2 different courses and a drink. How many dinner options does she have?\r
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document.write( "Textbook answer is 222.\r
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document.write( "Can someone explain the solution of this problem?\r
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document.write( "I thought of
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document.write( "4*5*6 = 120 (for the first course)
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document.write( "3*4*5 = 60 (for the second course)
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document.write( "then i add them up to 180 and multiply it by 3 to get 540. \n" );
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Algebra.Com's Answer #825983 by ikleyn(52778)![]() ![]() You can put this solution on YOUR website! .\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In such problems, the answer is the product of some participating numbers.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "But 222 = 2*111 = 2*3*37, and the number 37 is not among the input numbers.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Therefore, the answer in the textbook, mentioned in your post, is INCORRECT.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In our days, there are many pseudo-textbooks in the Internet, written/composed by pseudo-specialists for pseudo-students.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |