document.write( "Question 1150898: Given the population of elements (22,24,26)
\n" ); document.write( "Write down all possible samples of size two chosen by simple random sampling \n" ); document.write( "
Algebra.Com's Answer #772466 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "We have n = 3 items to form groups of r = 2.
\n" ); document.write( "We can use the nCr formula to get
\n" ); document.write( "nCr = (n!)/(r!*(n-r)!)
\n" ); document.write( "3C2 = (3!)/(2!*(3-2)!)
\n" ); document.write( "3C2 = (3!)/(2!*1!)
\n" ); document.write( "3C2 = (3*2*1)/(2*1*1)
\n" ); document.write( "3C2 = 6/2
\n" ); document.write( "3C2 = 3\r
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\n" ); document.write( "\n" ); document.write( "There are 3 groups we can form
\n" ); document.write( "{22,24}
\n" ); document.write( "{22,26}
\n" ); document.write( "{24,26}
\n" ); document.write( "You can think of it as \"there are 3 ways to not pick an item\". Or put another way \"there are 3 ways to pick an item that we will erase\" (whatever isnt erased is in the two item set).\r
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\n" ); document.write( "\n" ); document.write( "The order does not matter within any given set. Something like {22,24} is the same as {24,22}. It's often handy to list the values from smallest to largest just so things stay consistent.
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