the probability of solving a question by ABC is 1/2, 1/3, 1/4 respectively find the probability 1) exactly one of them will solve the question 2) exactly two of them solve the question 3) question is not solved 4) at least one of them solve the question
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Answer:
1). 13/6
2). 13/12
3). 13/18
4). 13/18
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