document.write( "Question 313342: There are 4 boys and 3 girls. What is the probability the boys and girls sit alternately?
\n" ); document.write( " Ans 1/35 \n" ); document.write( "
Algebra.Com's Answer #224055 by Theo(13342)\"\" \"About 
You can put this solution on YOUR website!
you can have:\r
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\n" ); document.write( "\n" ); document.write( "The probability that the first slot will be taken by a boy is 4/7
\n" ); document.write( "the probability that the second slot will be taken by a girl is 3/6
\n" ); document.write( "The probability that the third slot will be taken by a boy is 3/5
\n" ); document.write( "Then 2/4
\n" ); document.write( "Then 2/3
\n" ); document.write( "Then 1/2
\n" ); document.write( "Then 1/1\r
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\n" ); document.write( "\n" ); document.write( "the probability that all of this will occur is 4/7 * 3/6 * 3/5 * 2/4 * 2/3 * 1/2 * 1/1 which comes out to be (4*3*3*2*2*1*1)/(7*6*5*4*3*2*1) which comes out to be 1/35.\r
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\n" ); document.write( "\n" ); document.write( "Since this arrangement can only happen in one way, then that's your answer.\r
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