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Mathematics 9 Online
OpenStudy (1dfanatic):

A bag contains 4 yellow marbles and 6 green marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. What is the probability that the first marble is green and the second one is yellow?

OpenStudy (anonymous):

What's P(1st marble green)?

OpenStudy (1dfanatic):

1/6

OpenStudy (anonymous):

6 green marbles and ten marbles total

OpenStudy (anonymous):

so 6/10

OpenStudy (1dfanatic):

but you didn't put one back to wouldn't it be 9?

OpenStudy (anonymous):

For the first pick it's 6/10. For the 2nd pick, the denominator is 9

OpenStudy (anonymous):

Is that what you were asking?

OpenStudy (1dfanatic):

yeah cx

OpenStudy (1dfanatic):

for the second pick wouldnt we do the yellow? i'm so confused..

OpenStudy (anonymous):

Yes the yellow. So what would that fraction be?

OpenStudy (1dfanatic):

4/9

OpenStudy (anonymous):

Yes. Now multiply them to get the answer

OpenStudy (1dfanatic):

4/15 cx thank you for your help these confuse me alot if you havent noticed.

OpenStudy (anonymous):

That's right. Yeah I'm not a fan of statistics either.

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