Multiple Choice
An urn contains 50 black balls and 20 blue balls.If you select 30 balls at random,what is the probability that exactly 20 of them will be black balls?
A) 0.2581
B) 0.3861
C) 0.6667
D) 0.1573
E) 0.4770
Correct Answer:
Verified
Correct Answer:
Verified
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