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A green marble is selected at random from a bag of 4 yellow, 3 green, and 9 blue marbles and not replaced. What is the probability a second marble selected will be green

User Dejo Dekic
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1 Answer

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27 votes
The probability of a second marble selected being green is 2:15, I’m pretty sure. If one green marble was taken from the bag and not replaced, then there are 2 green marbles left. There are 13 total marbles left in the bag (that aren’t green, and based on what they have told us in the problem so far), and 2+13 is 15. So, there is a 2 out of 15 marbles chance of selecting a green marble. I think that’s right.
User Cora
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