anonymous one year ago An urn contains 10 red balls, 10 green balls, and 5 white balls. 5 balls are selected. In how many ways can 5 balls be drawn if at least 3 are green?

1. anonymous

2. tkhunny

Let's see, 25, chosen 5 at a time gives 6375600. 6375600/16002 = 398.42519685-- That can't be right.

3. IrishBoy123

i make it 12600 that's $C_{3}^{10} \times C_{2}^{15}$