document.write( "Question 1135864: Four couples are seated on a bench. Find the number of ways a particular couple must:
\n" ); document.write( "a. Sit together
\n" ); document.write( "b. Not sit together \n" ); document.write( "

Algebra.Com's Answer #753585 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Four couples are seated on a bench. Find the number of ways a particular couple $\"highlight%28cross%28must%29%29\"$ can:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "(a)  Sit together.         ANSWER :  2*((4-1)*2+1)! = 2*7! = 2*5040 = 10080.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "(b)  No sit together.      ANSWER :  8! - 10080 = 30240.\r\n" );
document.write( "\r\n" );
document.write( "                                     The complement set to (a).\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );