document.write( "Question 231056: Hello,\r
\n" );
document.write( "\n" );
document.write( "I always have trouble with word problems and I just want to make sure that I am doing this one correctly:\r
\n" );
document.write( "\n" );
document.write( "Eight horses are entered into a race. In how many ways can they cross the finish line, if ties are not allowed?\r
\n" );
document.write( "\n" );
document.write( "is it: 8*8*8*8*8*8*8*8 (8^8)\r
\n" );
document.write( "\n" );
document.write( "thank you for your help,
\n" );
document.write( "Peter \n" );
document.write( "
Algebra.Com's Answer #171071 by Theo(13342) You can put this solution on YOUR website! 8 horses can cross the finish line in 8! ways.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Consider 3 horses.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3! = 3*2*1 = 6 ways they can cross the finish line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Those ways would be:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "123 \n" ); document.write( "132 \n" ); document.write( "213 \n" ); document.write( "231 \n" ); document.write( "312 \n" ); document.write( "321\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now consider 4 horses in a race.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The number of ways they can cross the finish line is 4!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4! = 4*3*2*1 = 24\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Those ways are:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "1234 \n" ); document.write( "1243 \n" ); document.write( "1324 \n" ); document.write( "1342 \n" ); document.write( "1423 \n" ); document.write( "1432 \n" ); document.write( "---- \n" ); document.write( "2134 \n" ); document.write( "2143 \n" ); document.write( "2314 \n" ); document.write( "2341 \n" ); document.write( "2413 \n" ); document.write( "2431 \n" ); document.write( "---- \n" ); document.write( "There should be 2 more sets of 6 which would make a total of 24. \n" ); document.write( "I'll do them just to show you. \n" ); document.write( "---- \n" ); document.write( "3124 \n" ); document.write( "3142 \n" ); document.write( "3214 \n" ); document.write( "3241 \n" ); document.write( "3412 \n" ); document.write( "3421 \n" ); document.write( "---- \n" ); document.write( "4123 \n" ); document.write( "4132 \n" ); document.write( "4213 \n" ); document.write( "4231 \n" ); document.write( "4312 \n" ); document.write( "4321 \n" ); document.write( "----\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I think that does it.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "For your problem, the numbers are too high to show each one separately, but the formula looks like it will do the trick so your answer is:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "8! which equals 8*7*6*5*4*3*2*1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "That equals 40,320 ways.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |