In a green container, there are yellow, blue, and orange balls. The chance of picking a yellow ball is 1/4. If a yellow ball is drawn, replaced, and then a blue ball is drawn, the probability of this happening is 1/8. What is the probability of drawing a blue ball?

Answer Choices

Correct answer marked below

1/2

Correct

1/3

1/4

1/6

1/8

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Explanation

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Official Explanation

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The probability of drawing a yellow ball is P(Y) = 1/4. The probability of drawing a yellow ball, replacing it, and then drawing a blue ball is given…

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Comments

pulkitFeb 20, 2025

taking my GMAT next month, this helps!

SankariMar 30, 2024

Great

What this question tests

What it tests

Your ability to compute probabilities of single and compound events, including 'at least one' questions.

Common trap

Forgetting to use the complement for 'at least one', or treating dependent events as independent.