Algebra.Com's Answer #648239 by ikleyn(52780)![\"\"](\"/images/stars/stars-13.gif\")  
You can put this solution on YOUR website!
.
\n" );
document.write( "An environmental organization has 19 members. Each member will be placed on exactly 1 of 4 teams.
\n" );
document.write( "Each team will work on a different issue. The first team has 3 members, the second has 5, the third has 7, and the fourth has 4.
\n" );
document.write( "In how many ways can these teams be formed?
\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "\r\n" );
document.write( "1. You can select 3 members from 19 members to the 1-st team by  ways.\r\n" );
document.write( "\r\n" );
document.write( "2. Then you can select 5 members from remaining 19-3 = 16 members to the 2-nd team by  ways.\r\n" );
document.write( "\r\n" );
document.write( "3. Then you can select 7 members from remaining 16-5 = 11 members to the 3-rd team by  ways.\r\n" );
document.write( "\r\n" );
document.write( "4. Then you can select 4 members from remaining 11-7 = 4 members to the 4-th team by  = 1 ways.\r\n" );
document.write( "\r\n" );
document.write( " (Actually, you just have no choice at this last step).\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "5. In total, you have * * ways to form yours teams. \r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Thus I just explained the methodology to you, and I leave to you making the calculations.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Last notice: the quantities  are the numbers of combinations of \"n\" things taken \"k\" at a time.\r\n" );
document.write( "\r\n" );
document.write( "See the lesson Introduction to Combinations in this site.\r\n" );
document.write( "
\n" );
document.write( " \n" );
document.write( " |