document.write( "Question 824371: There are 18 pictures of Christmas Trees...\r
\n" ); document.write( "\n" ); document.write( "There are 18 different names belonging to those trees...\r
\n" ); document.write( "\n" ); document.write( "You have to guess which tree belongs to whom...\r
\n" ); document.write( "\n" ); document.write( "What are the odds of getting 8 correct answers?
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Algebra.Com's Answer #496436 by rothauserc(4718)\"\" \"About 
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we need to multiply the following probabilities
\n" ); document.write( "1 correct = 1/18
\n" ); document.write( "1 correct after 1 correct = 1/17
\n" ); document.write( "1 correct after 2 correct = 1/16
\n" ); document.write( "1 correct after 3 correct = 1/15
\n" ); document.write( "1 correct after 4 correct = 1/14
\n" ); document.write( "1 correct after 5 correct = 1/13
\n" ); document.write( "1 correct after 6 correct = 1/12
\n" ); document.write( "1 correct after 7 correct = 1/11
\n" ); document.write( "therefore 8 correct is
\n" ); document.write( "(1/18)*(1/17)*(1/16)*(1/15)*(1/14)*(1/13)*(1/12)*(1/11) = 1/1.76432256e9
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