# math *check*

A bag contains 9 green marbles and 11 white marbles. You select a marble at random. What are the odds in favor of picking a green marble?
A. 9:20
B. 2:9
C. 11:9
D. 9:11***?

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1. prob(green) = 9/20
prob(not green) = 11/20

odds in favour of green = (9/20) : (11/20)
= 9: 11

you are correct.

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posted by Reiny
2. thank you!

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posted by Me
3. Correct!

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4. you are correct.

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5. why did it have to be 911

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6. just cuz why not

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