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October 4th, 2019, 10:46 AM   #1
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Find probability of choosing 2 black balls from 4 identical black balls and 7 identical red balls.

Last edited by skipjack; October 4th, 2019 at 02:28 PM.
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October 4th, 2019, 03:59 PM   #2
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$\frac{4}{11}\frac{3}{10}$.
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October 5th, 2019, 04:30 AM   #3
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Find the probability of choosing 2 black balls from 4 identical black balls and 7 identical red balls.
Are you choosing balls one after another or at the same time?
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October 5th, 2019, 02:06 PM   #4
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Are you choosing balls one after another or at the same time?
It doesn't matter.
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October 5th, 2019, 02:11 PM   #5
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It doesn't matter.
Don't spoil!!!
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