Am I doing this right? (Probability)?

1 ⤊

Am I doing this right? (Probability)?

You have a bag with 45 marbles: 20 red, 15 green, 10 blue. You're drawing six. What are the odds they're all red? What are the odds they're all the same color?

For the first, I'm just flat-out doing (20/45)*(19/44)*(18/43)*...*(1... I think that's the right way, but I'm not positive.

For the second, I think it's ((20/45)*...*(15/40))+((15/45)... - or, to sum it up, the odds of each all-one-color result.

Is that the right way to do this?

2006-08-27 08:17:46 · 3 answers · asked by Anonymous 3 in Science & Mathematics ➔ Mathematics

3 answers

Yes for both

2006-08-27 08:25:22 · answer #1 · answered by Farid R 2 · 1⤊ 0⤋

Yes your right.

2006-08-27 15:49:48 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋

yes you are on the right track

2006-08-27 15:23:13 · answer #3 · answered by raj 7 · 0⤊ 0⤋