A bag contains 3 red, 4 blue, and 5 green balls. Two balls are drawn without replacement. What is the probability both are the same color?
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Get StartedA bag contains 3 red, 4 blue, and 5 green balls. Two balls are drawn without replacement. What is the probability both are the same color?
Options:
- 19/66
- 1/3
- 5/22
- 7/33
Correct answer: 19/66
Explanation: Number of favorable pairs: C(3,2)+C(4,2)+C(5,2)=3+6+10=19; total pairs C(12,2)=66, so probability = 19/66 using these concrete combinatorial counts.
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