Question

4 cards are drawn at random and without replacement from a standard deck of 52 cards.What is the probability of atleast 2 kings ?

Answer 1

Wrong numbers before sorry

Answer 2

Anyway first draw King at 1/13 right and not K and 12/13

Answer 3

So the branch with a K on #1, then K on #2 is 3/51 for second card.
So that's 1/52 times 3/51 for that branch.

Answer 4

I think it'll be too hard to do four branches. Help?

Answer 5

use combinations

Answer 6

thanks for answering but i still dont get it

Answer 7

have you used \[{n\choose r}=\,_n C_r=\frac{n!}{r!(n-r)!}\]

before?

Answer 8

nope i havent seen or used that before

Answer 9

by the time you have reached a question like this you should have.

Answer 10

@Zarkon the trouble I'm having is sampling without replacement..