SSC CGL 9 Aug 2015 Shift 2 Paper

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Question : 144 of 200

Marks: +1, -0

If the sum of two numbers, one of which is

2/5

times the other, is 50, then the numbers are

${115}/7$ and ${235}/7$
${150}/7$ and ${200}/7$
${240}/7$ and ${110}/7$
${250}/7$ and ${100}/7$

Solution:

First number = x (let)
∴ Second number =

{2x}/5

∴ x +

{2x}/5

= 50
⇒

{5x+2x}/5

= 50
⇒ 5x + 2x = 50 × 5
⇒ 7x = 250
⇒ x =

{250}/7

∴ Second number
=

2/5 × {250}/7

=

{100}/7

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