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SSC Sample Paper SSC CGL - Sample Paper-16

  • question_answer
    If A : B = 3 : 4, B : C = 5 : 7 and C : D = 8 : 9,  then A : D is equal to

    A) 3 : 7                             

    B) 7 : 3

    C) 21: 10              

    D) 10: 21

    Correct Answer: D

    Solution :

    \[A:D=\frac{A}{D}=\frac{A}{B}\times \frac{B}{C}\times \frac{C}{D}\] \[=\frac{3}{4}\times \frac{5}{7}\times \frac{8}{9}=\frac{10}{21}=10:21\]


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