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A bag contains 11 orange cubes and 9 black cubes. Once a cube is picked, it is not replaced. What is the probability of choosing 2 black cubes? A. 3/10 B. 3/20 C. 14/95 D. 18/95
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A bag contains 11 orange cubes and 9 black cubes. Once a cube is picked, it is not replaced. What is the probability of choosing 2 black cubes?

A. 3/10 B. 3/20 C. 14/95 D. 18/95

User Albaregar
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|\Omega|=20\cdot19=380\\ |A|=9\cdot8=72\\\\ P(A)=(72)/(380)=(18)/(95)\Rightarrow \text{D}
User DamianoPantani
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