On Tue, 29 Jul 2003 21:16:09 +0800, James Lo <[EMAIL PROTECTED]> wrote:
> Suppose that four cards are drawn successively from an ordinary deck > of 52 cards, with replacement and at random. What is the probability > of drawing at least one king? > > Answer from the book: 0.274 > > My solution and answer: > You seem to have the right notion, keeping in mind that it is handy to reverse between P and (1-P). But: In drawing one card, the probability of a king is 1/13. Your answer for drawing 4 cards is less than that. Uh-oh. Why start with 1/52 instead of 1/13? [ ... ] -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html "Taxes are the price we pay for civilization." Justice Holmes. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
