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Комбинаторика
Apr. 9th, 2014 07:27 pmникогда не думала, что комбинаторика может быть такой веселой наукой. Сидим с Даней, я как бы помогаю делать задачки - в основном оказываю моральную поддержку и отлавливаю явные ляпы, так-то он это решает если не лучше, то уж точно быстрее. По ходу дела родилось стихотворение:
Three identical Dannys
Are sitting in a tree.
One fell off and bruised his left knee.
Two identical Dannys
Are sitting in a tree.
One fell off and bruised his right knee.
Three not quite identical Dannys
Are sitting in a tree.
One fell off and bruised a knee.
What is the probability that now there are at least two identical Dannys?
Three identical Dannys
Are sitting in a tree.
One fell off and bruised his left knee.
Two identical Dannys
Are sitting in a tree.
One fell off and bruised his right knee.
Three not quite identical Dannys
Are sitting in a tree.
One fell off and bruised a knee.
What is the probability that now there are at least two identical Dannys?
