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OpenStudy (anonymous):
7th grade question easy will fan and medal - http://gyazo.com/9db4f5606163f5bd9d9b809bb49386c2
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OpenStudy (anonymous):
What proportion of the marbles have been black?
OpenStudy (anonymous):
B
OpenStudy (anonymous):
B BTW i'm also doing 7th grade math
OpenStudy (anonymous):
50 marbles have been drawn, and they've all been put back in the bag. Of those 50, 30 were black. This suggests that 3/5 of the marbles in the bag are black. So if you drew another marble, you would expect a 3/5 chance that the marble would be black.
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