Post-UTME Mathematics 2017 Objective — Question 10
Question 10 of 50 from the Post-UTME Screening (Post-UTME) Mathematics 2017 Objective paper, with the correct answer and a full explanation.
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A bag contains 12 similar balls, 5 of which are yellow, 4 red and the rest black. If a ball is picked at random, what is the probability that it is not black?
- A. 1/2
- B. 3/5
- C. 2/3
- D. 3/4Correct
Explanation
Black balls = 12-5-4 = 3. P(not black) = (12-3)/12 = 9/12 = 3/4.
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