On Tue, 29 Jul 2003 09:58:08 -0400, Rich Ulrich <[EMAIL PROTECTED]> wrote:
>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? > >[ ... ] So, what should be the correct solution to get 0.274 ? I knew that 1/13 is the probability of a kings. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
