Multiple Choice Questions on Exactly one of them will be alive 25 years hence ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

Exactly one of them will be alive 25 years hence ........

Quantitative Aptitude ( CCS) Probability
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    Directions : The odds against a husband who is 45 years old, living till he is 70 are 7:5 and the odds against his wife who is now 36, living till she is 61 are 5:3 . Find the probability that

    Exactly one of them will be alive 25 years hence :

    29/48

    Incorrect Answer

    42/57

    Incorrect Answer

    23/57

    Incorrect Answer

    23/48

    Correct Answer
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    Explanation:

    Husband: 7:5 [(7/12) against (5/12) infavor)
    Wife : 5:3 [(5/8) against (3/8) infavor)
    (5/12)*(5/8)+(3/8)*(7/12)=23/48

    Hence, option 4 is the correct answer.

    By: Amit Kumar
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