Multiple Choice Questions on If a 2b 55 and a ndash 2b 13 find the value of b ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

If a 2b 55 and a ndash 2b 13 find the value of b ........

Quantitative Aptitude (RRB NTPC) Algebra
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    If a + 2b = 55 and a – 2b = -13, find the value of b.

    21

    Incorrect Answer

    14

    Incorrect Answer

    17

    Correct Answer

    19

    Incorrect Answer
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    Explanation:
    a + 2b = 55
    a – 2b = -13
    subtracting both the equation
    4b = 68
    b =17

    By: Barka Mirza
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