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There are 9 yellow and 4 purple balls in a bag. If you randomly choose balls one at a time, with replacement, what is the probability of choosing 1 yellow ball and then 2 purple balls? 165/5210 24/1329
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Jul 14, 2019
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There are 9 yellow and 4 purple balls in a bag. If you randomly choose balls one at a time, with replacement, what is the probability of choosing 1 yellow ball and then 2 purple balls?
165/5210
24/1329
144/2197
28/1335
Mathematics
high-school
Leroy Stav
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Leroy Stav
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9+4 = 13 total balls
1st pick would be 9/13 probability of picking yellow
2nd pick would be 4/13 probability
3rd pick would be 4/13 probability
total probability : 9/13 * 4/13 * 4/13 =
144/2197
Mohammadreza Khedri
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Jul 18, 2019
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Mohammadreza Khedri
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