If you are dealt 4 cards from a shuffled deck of 52 cards what is the probability that all 4 cards are clubs?

I am assuming that you are not replacing the cards in the deck after each draw.

The probability of drawing no clubs = (52-13)/52*(51-13)/51*(50-13)/50*(49-13)/49

p= 39/52*38/51*37/50*36/49 ~= 0.3038 = 30.38%

The probability of drawing at least one club = 1-0.3038=.6962 = 69.62%