A player picks random cards from an ordinary card deck, without returning them to the deck. How many cards should he pick so as to get at least one ace with 70% probability?

(In reply to Solution by Luna)

How are these successive percentages being calculated?

Also, consider that Penny has verified a previous,different, answer, by simulating actual draws of cards.

Posted by Charlie on 2006-08-19 16:29:35