Created
September 4, 2012 18:47
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Girl Probability
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| girl = 0 | |
| boy = 1 | |
| at_least_one_girl = 0 | |
| all_girls = 0 | |
| 1000000.times{ | |
| one_girl = false | |
| num_girls = 0 | |
| 3.times { | |
| if (rand(2) == girl) | |
| one_girl = true | |
| num_girls += 1 | |
| end | |
| } | |
| at_least_one_girl += 1 if (one_girl) | |
| all_girls += 1 if (num_girls == 3) | |
| } | |
| puts at_least_one_girl / all_girls.to_f |
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