Posted by Carli on Thursday, November 5, 2009 at 11:42am.
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?

math  PsyDAG, Saturday, November 7, 2009 at 6:23pm
The odds of drawing a either a club or diamond on the first card = 26/52. The odds of drawing the other suit on the second card = 13/51.
For the probability of both happening, multiply the two probabilities.
For the probability of neither happening, subtract that last value from 1.