What is the value of x-y? (1) x + y = 11 (2) 4x - 4y = 8

Question

What is the value of x-y?

(1) x + y = 11

(2) 4x - 4y = 8

yashikaaggarwal · Answer

To find: What is the value of x-y?

1)X+y=11
Not sufficient to know the difference between x and y. 
(Insufficient)

2)4x-4y=8
4(x-y) = 8
X-y = 2
(Sufficient)

Answer is B

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Nipungupta9081 · Answer

Answer B

1) X + Y = 11 ----- Not Sufficient.

2) 4x-4y=8 
Dividing both sides by 4 
 = X - Y = 2 ---- Sufficient

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abhijitpatil · Answer

Statement 1) 
x + y = 11 ; Can we get x-y ? :- No ; hence (Insufficient )

Statement 2)

4x-4y = 8 ; Can we get x-y ? :- Yes ! How ?
4(x-y) = 8 ; 4 common outside bracket 
x-y = 2 ; hence (Sufficient)

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