A box contains 3 red, 4 blue, and 5 green balls. If one ball is drawn at random, what is the probability that it is NOT red?

Topic: Probability
Subtopic: Complementary Events

A1/4

B1/3

C3/4

D2/3

Explanation

Total balls = 12. Non-red balls = 4 blue + 5 green = 9. Probability = 9 / 12 = 3/4.

Exam Relevance

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