Multiple Choice Questions on The average weight of P Q R is 90 kg If the average weight of P Q be 60 kg and that of Q and R be 10........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The average weight of P Q R is 90 kg If the average weight of P Q be 60 kg and that of Q and R be 10...........

Quantitative Aptitude (CDS) Average
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    The average weight of P, Q, R is 90 kg. If the average weight of P, Q be 60 kg and that of Q and R be 105 kg, What is the weight of Q?

    60kg

    Correct Answer

    70kg

    Incorrect Answer

    50kg

    Incorrect Answer

    65kg

    Incorrect Answer
    Explanation:

    Let P,Q and R represent their individual weights. then,
    P+Q+R = (90x3) = 270kg
    P+Q = (60x2) = 120kg
    Q+R = (105x2) = 210kg
    Q=(P+Q) + (Q+R) - (P+Q+R) = (120+210-270)kg = 60kg

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