The probabilities that John and Jane will pass an examination are 0.9 and 0.7 respectively.
FURTHER MATHEMATICS
WAEC 2019
The probabilities that John and Jane will pass an examination are 0.9 and 0.7 respectively. Find the probability that at least one of them will pass the examination.
- A. 0.28
- B. 0.67
- C. 0.72
- D. 0.97
Correct Answer: D. 0.97
Explanation
(0.9 x 0.7) + (0.1 x 0.7) = (0.9 x 0.3) = 0.63 + 0.07 + 0.27 = 0.97
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