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March 26th, 2013, 06:13 AM  #1 
Senior Member Joined: Mar 2012 Posts: 118 Thanks: 0  statistics in math
How many different ways can a president or vice president be chosen from a list of 20people?

March 26th, 2013, 08:48 AM  #2 
Senior Member Joined: Mar 2012 Posts: 118 Thanks: 0  Re: statistics in math
ops i get this one for president, we can choice 20 ways and the vice president, just 19 ways multiplication of them = 20 * 19 = 380 

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