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tliff/gist:6800b8afeb6e8bc38664

Created May 5, 2014 20:30
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gistfile1.rb
success = 0
1000000.times {success += [0,1,2,3,4].zip([0,1,2,3,4].shuffle).select{|a,b| a==b}.size}
puts success.to_f/1000000
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