Posted by Twg on .
You are dealt two cards successively without replacement from a standard deck of 52 playing cards. Find the probability that both cards are black.

MATH Prob. 
PsyDAG,
# of black cards/total cards * number of remaining black cards/remaining total cards.
This is an "and" relationship. 
MATH Prob. 
Twg,
So if there are 26 black cards in a deck you would take 26/52*24/50 right??

MATH Prob. 
PsyDAG,
you probability of picking the first card is right, but (since one black card has already been picked without replacement) the probability of picking the second black card is 25/51.