WAEC Mathematics 2016 Objective — Question 42
Question 42 of 50 from the West African Examinations Council (WAEC) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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42. A bag contains 5 red and 4 blue identical balls. If two balls are selected at random from the bag, one after the other, with replacement, find the probability that the first is red and the second is blue. A. 2/9 B. 5/18 C. 20/81 D. 5/9
- A. 2/9
- B. 5/18
- C. 20/81Correct
- D. 5/9
Explanation
P(1st red)×P(2nd blue)=5/9×4/9=20/81.
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