Question

    A brother and a sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5 and that of the sister’s selection is 1/3.What is the probability of only one of them is selected

    A 2/7 Correct Answer Incorrect Answer
    B 2/5 Correct Answer Incorrect Answer
    C 4/7 Correct Answer Incorrect Answer
    D 2/11 Correct Answer Incorrect Answer

    Solution

    Probability of only one of them selected = 1/5×2/3 +4/5×1/3 =2/15 +4/15 =6/15 =2/5

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