document.write( "Question 867481: Given a group of students: G=(Allen,Brenda,Chad,Dorothy,Eric) or G=(A,B,C,D,E)count the different ways of choosing the following officers or representatives for student congress. Assume that no one can hold more than one office.\r
\n" );
document.write( "\n" );
document.write( "A president, a secretary, and a treasurer, if the president must be a woman and the other two must be men\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #523076 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! There are two women: Brenda and Dorothy (B, D)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are three men: Allen, Chad, and Eric (A,C,E)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are two ways to choose the president. This is because \"the president must be a woman\".\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So we could start off with Brenda (B) to have B __ __ \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The blank spaces represent slots for the secretary and treasurer.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are 3 men to fill the second slot, then 3-1=2 men to fill the next slot. So 3*2 = 6 permutations possible. These permutations are:\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "BAC \n" ); document.write( "BCA \n" ); document.write( "BAE \n" ); document.write( "BEA \n" ); document.write( "BCE \n" ); document.write( "BEC\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Note: order matters and BAC is different from BCA (since Allen is secretary and Chad is treasurer in BAC; but Chad is secretary and Allen is treasurer in BCA)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If we picked Dorothy for president, then we get\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "DAC \n" ); document.write( "DCA \n" ); document.write( "DAE \n" ); document.write( "DEA \n" ); document.write( "DCE \n" ); document.write( "DEC\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are 6 ways in the first group (with Brenda as president) and there are 6 ways in the second group (with Dorothy as president). \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So there are 6+6 = 12 possible ways to have a president, a secretary, and a treasurer, if the president must be a woman and the other two must be men (given the candidates Allen,Brenda,Chad,Dorothy,Eric). \n" ); document.write( " \n" ); document.write( " |