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OpenStudy (anonymous):
There are 2 blue balls, 4 red balls, and 3 white balls in a bag of balls. If a person selects two of the balls, what is the probability that the second one is blue given that the first one was white?
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OpenStudy (joannablackwelder):
If you pick a white one out first, what colors are the balls left in the bag?
OpenStudy (anonymous):
all three colors, just that there will be 2 white ones left
OpenStudy (joannablackwelder):
Right, so the probability of picking blue is the number of blue divided by the total options.
OpenStudy (joannablackwelder):
What is that fraction?
OpenStudy (joannablackwelder):
Or first, how many blues do you have and how many in total?
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