Suppose you had number cards in a deck, such that you had 2 2s, 3 3s, 7 7s, and 8 8s. (and no other cards in that deck)

If you were to shuffle the deck (consider the cards to be random after shuffling) and take off the first 4 cards, (such that the first card is thousands place, the second card is the hundreds place, so on), what is the probability that this number will be a perfect square?? Also, how would you find this probability without "trial and error" or "brute force"?

it says that if you take four cards off the top. therefore it has to be a four digit number and not the squares between 0 and 100. so i really don't see how 0 is the solution.

Posted by becca on 2003-06-28 23:31:35