RRB RPF RPSF SI and CONS Model Papers 7 with solutions

Question : 58 of 120

Marks: +1, -0

If A : B = 3 : 4 and B : C = 6 : 5, then A : (A + C) is equal to

Solution:

(3)

{A}/{B} ×{B}/{C}= {3}/{4} ×{6}/{5}

⇒ {A}/{C}= {9}/{10}

⇒ {C}/{A}= {10}/{9}

⇒{C}/{A}+1= {10}/{9}+1

⇒ { {C}+ {A}}/{ {A}}= {10+9}/{9}= {19}/{9}

⇒ A :(A+C)=9 : 19

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