Tuesday
September 30, 2014

Homework Help: Math: Help: probability

Posted by bart on Sunday, May 16, 2010 at 5:43pm.

Which answer, if any, is correct to:
Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What are the
odds against drawing a club and a diamond? My options are 13:204; 204:13, 13;191; or 191:13

I had two different people help me and here are the two different answers.

13/52*13/51= 169/2652= 13204 = 204:13

The other way was, but doesn't make sense is: P(club and diamond) = (13/52)(13/51)
P(not drawing a club and a diamond) = 1 - ( /(52*51)) = (52*51-13 )/(52*51)


odds against = P(against)/P(for) = (52*51- )/ = 2483:169= 191:13

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