Multiple Choice Questions on If a b 5 b c 6 and c a 7 then how do we find the value of a ........ for SSC CGL Exam Preparation

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Multiple Choice Questions

If a b 5 b c 6 and c a 7 then how do we find the value of a ........

Quantitative Aptitude (CGL) Algebra
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    If a+b=5, b+c=6 and c+a=7, then how do we find the value of a?

    3

    Correct Answer

    11/7

    Incorrect Answer

    7/11

    Incorrect Answer

    7/4

    Incorrect Answer
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    Explanation:

    a+b=5?(1) 
    b+c=6?(2)
    c+a=7?(3)
    Add equations (1) and (3).
    (a+b)+(c+a)=5+7
    ?2a+(b+c)=12
    b+c=6 from equation (2).
    2a+6=12
    ?2a=12−6=6
    ?a=62
    a=3 

    By: MIRZA SADDAM HUSSAIN
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