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A box contains 4 white balls and 5 red balls. I draw 3 of them out of the box, one at a time, and set them aside. What is the probability that all three balls have the same color?

 Nov 30, 2020
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P(www)+P(RRR)

 

P(WWW)=  \(\frac{4}{9}*\frac{3}{8}*\frac{2}{7}\)

 

You can continue from there

 Nov 30, 2020

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