If y : x = 4 : 15, then the value of [{x -y} /{x +y}] is

RRB NTPC Mains or Stage 2 Model Paper 8 with solutions

Question : 38 of 120

Marks: +1, -0

If y : x = 4 : 15, then the value of

[{x -y} /{x +y}]

Solution:

(a)

y : x = 4 : 15 ⇒ x : y = 15 : 4

By componendo and dividendo,

{x- y }/{x +y}={15 -4}/{ 15 +4}= 11/ 19

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