Engineering Board Exam Reviewer · Basic Probability · medium
A box has 4 white and 6 black balls. Three balls are drawn at random without replacement. What is the probability that exactly 2 are white?
- 36/125
- 3/10
- 1/6
- 2/5
Answer
B. 3/10
Solution
P= 4C2·6C110C3=6·6/120=3/10.
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