A bag contains 4 red and 6 blue marbles. If two marbles are drawn randomly without replacement, what is the probability that both marbles drawn are blue?
✓ Correct Answer: Option B
The probability of drawing the first blue marble is 6/10. After drawing one blue marble, there are 5 blue marbles left and a total of 9 marbles. So, the probability of drawing a second blue marble is 5/9. The combined probability is (6/10) * (5/9) = 30/90 = 1/3.
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This 3-level GMAT Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
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