SSC CHSL 10 Jan 2017 Shift 2 Paper

Question : 77 of 100

Marks: +1, -0

If 3A = 7B = 13C, then A : B : C is equal to

Solution:

Let 3A = 7B = 13C = k
⇒

A=k/3,B=k/7,C=k/13

⇒ Ratio of A : B : C =

k/3:k/7:k/13

1/3:1/7:1/13

L.C.M. of 3,7 and 13 = 273, thus multiplying by 273, we get :
=

273/3:273/ 7 : 273/ 13

= 91 : 39 : 21

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