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OpenStudy (reagan18):

One bag contains 4 white balls and 3 black balls. If someone draws one ball from the bag and then replaces it and draws another, what is the probability that both will be black?

OpenStudy (royalranger):

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OpenStudy (reagan18):

2/7?

OpenStudy (reagan18):

3/7?

OpenStudy (royalranger):

Lets do the first one: There are a total of 7 balls. # black and 4 white. So if we are going to draw a black one, there is a 3/7 chance.

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