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ivanzaharov [21]
3 years ago
11

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 probab

ility of choosing 1 yellow ball and then 2 purple balls?
165/5210

24/1329

144/2197

28/1335
Mathematics
1 answer:
anygoal [31]3 years ago
3 0
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

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