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  • Aptitude – Chain Rules – Notes For W.B.C.S. Examination.
    Posted on February 13th, 2019 in Paper VI : Arithmetic and Test of Reasoning
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    Aptitude – Chain Rules – Notes For W.B.C.S. Examination.

    Rule of three

    The method of finding the 4th proportional when the other three are given is called Simple Proportional or Rule of three.Continue Reading Aptitude – Chain Rules – Notes For W.B.C.S. Examination.

    Compound Proportional

    Repeated use of three is called Compound Proportional.

    Direct Proportional

    Two quantities are said to vary directly if on the increase ( or decrease) of the one , the other increase (or decrease) to the same extent.

    EXAMPLES

    1. More articles , more cost.
    2. More men, more work.

    Indirect Proportional

    Two quantities are said to vary indirectly if on the increase ( or decrease) of the one , the other decrease (or increase ) to the same extent.

    EXAMPLES

    1. Less time to finish a work , more persons at work.
    2. More speed , less is the time taken.

     

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