Thread: What are the odds of picking 2 green marbles from a jar of 7 green and 3 red?

I have a jar with 10 marbles, 7 of which are green and the other 3 are red. I randomly pull out 2 marbles. What are the odds that BOTH marbles selected are green?

3:7

(7/10) * (6/9) = 42/90 = 21/45 = 46.6666 %