document.write( "Question 396177: A group consisting of 3 boys and 2 girls is to line-up in a row for a photograph. In how many
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document.write( "ways may this be done assuming that
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document.write( "(a) there are no restrictions?
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document.write( "(b) the boys and the girls are each to stand together?
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document.write( "(c) only the two girls are to stand together?
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document.write( "(d) Rachel and Jonathan must not stand together? \n" );
document.write( "
Algebra.Com's Answer #281151 by sudhanshu_kmr(1152)![]() ![]() You can put this solution on YOUR website! a) \r \n" ); document.write( "\n" ); document.write( "no. of ways to arrange 5 persons if no restrictions = 5! = 120\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b) \n" ); document.write( "no. of ways to arrange 3 boys together = 3! = 6\r \n" ); document.write( "\n" ); document.write( "no. of ways to arrange 2 girls together= 2! = 2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "no. of ways to arrange boys and girls together in a row = 6 * 2 * 2 = 24 \n" ); document.write( "( as group of boys and group of girls can also arrange by 2 ways )\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "C) \n" ); document.write( "no. of ways when 2 girls are together = 4! * 2! = 48 \n" ); document.write( "(assume 2 girls as a single person, then total 4 persons)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "d) \n" ); document.write( "no. of ways when Rachel and Jonathan are together = 4! * 2! = 48\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " no. of ways when both are not together = total no. of ways - 48 \r \n" ); document.write( "\n" ); document.write( "= 120 - 48 \r \n" ); document.write( "\n" ); document.write( "= 72 \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if any problem related to understand the concept, you are welcome to contact... \n" ); document.write( " \n" ); document.write( " |