SOLUTION: The probability that a boy will pass the examination is 0.70 and that for girl is 0.60. What is the probability that at least one of them will pass the examination?
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Question 1110477: The probability that a boy will pass the examination is 0.70 and that for girl is 0.60. What is the probability that at least one of them will pass the examination? Answer by ikleyn(52928) (Show Source):
The probability that the boy will not pass the exam is 1-0.7 = 0.3.
The probability that the girl will not pass the exam is 1-0.6 = 0.4.
The probability that both of them will not pass the exam is 0.3*0.4 = 0.12.
The probability that at least one of them will pass the exam is the complement 1 - 0.12 = 0.88.
Answer. The probability under the question is 1 - (1-0.7)*(1-0.6) = 0.88.
