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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Liliana has a bag of marbles: 18 black, 15 red, 11 blue, and 8 white. Liliana randomly takes a red marble from the bag and leaves the marble on a table. What is the probability that she will next take a red or a white marble from the bag?
- A. 112/2601
- B. 2/17
- C. 11/26
- D. 22/51 / E. 23/52Correct
Explanation
After removing 1 red, 51 marbles remain (14 red + 8 white = 22 favourable); probability = 22/51.
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