In a jar there are 19 red jelly beans and 10 green jelly beans. In how many ways can you pick 4 red jelly beans and 4 green jelly beans?

Question

Yes, you are picking 8 jelly beans. The answer is supposedly 813, 960 though I can't seem to get it. — Ryan, Oct 01 '16 at 23:21

score 1 · Accepted Answer · answered Oct 01 '16 at 23:24

1

There are ${19 \choose 4}$ ways to pick 4 red jelly beans and $ {10 \choose 4}$ ways to pick 4 green jelly beans. Hence,

$${19 \choose 4}{10 \choose 4} = 813960.$$

answered Oct 01 '16 at 23:24

trang1618

1 Answers1