Total marbles = 10+4 = 14 prob of green marble = 10/14 = .71 Then if you are getting 2 green marbles you have to first take out 1 green marble so now there are 9 green marbles and 13 total green marbles prob of 2nd green marble = 9/13 = .69
So you would then multiply the probabilities of the individual events to get the total probability: .71 * .69 = .4899 therefore(with rounding):
The probability of getting two green marbles is 49%
