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OpenStudy (studytheworld):
Probability question! Suppose a bag contains 7 blue chips and 3 gold chips. What is the probability of randomly choosing a gold chip, not replacing it, and then randomly selecting another gold chip?
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Vocaloid (vocaloid):
any ideas?
OpenStudy (studytheworld):
Well since there's 10 chips in the bag and three are gold, I thought the first one would be a 3/10 chance of getting a gold chip... am I right?
Vocaloid (vocaloid):
good but there's one more step
Vocaloid (vocaloid):
what about the second gold chip?
OpenStudy (studytheworld):
Yeah, after that wouldn't it be 2/9?
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Vocaloid (vocaloid):
perfect! then you just multiply 3/10 times 2/9
OpenStudy (studytheworld):
Ohh okay that makes sense. I was trying to add the two numbers.
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