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IF Y-X <0 then

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Re: IF Y-X <0 then

by parallel_chase » Sat Sep 06, 2008 9:53 am
gmatrant wrote:If y-x <0 then
A. x>y
B. Both x and y are positive
C. Only one of the two is negative
D. x < y
E. None of the above.

Ans : E, how come shouldnt it be A.
This is a must be true question. Therefore, the answer option should hold true for all cases.

A. x>y

y=2, x =4

2-4 = -2<0. Eliminate.

B. Both x and y are positive
Both positive holds true for above case,

y=-2, x=2

-2 - (+2) = -4<0. Eliminate.

C. Only one of the two is negative

after looking at above cases we can Eliminate this as well.

D. x < y

y=-3, x=-6
-6-(-3) = -6+3 = -3<0. Eliminate.

E. None of the above.

Since we are only left with this option. Answer is E.


Hope its clear.
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by Ian Stewart » Sat Sep 06, 2008 10:55 am
The answer is certainly A; just add x to both sides of the inequality. Where is the question from?
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by sumithshah » Sat Sep 06, 2008 11:05 am
Your reasoning appears wrong!

You are saying :

For A, X>Y

y=2, x =4

2-4 = -2<0. Eliminate - why eliminate? This is in accordance with the given condition
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by parallel_chase » Sat Sep 06, 2008 11:08 am
sumithshah wrote:Your reasoning appears wrong!

You are saying :

For A, X>Y

y=2, x =4

2-4 = -2<0. Eliminate - why eliminate? This is in accordance with the given condition
Absolutely Right!

Lesson learnt. Just have to be bit more careful the next time.
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by sumithshah » Sat Sep 06, 2008 11:10 am
but then still doesn't solve the problem - the OA is E! or the OA is wrong.

where did you get this question from @ the guy who started this thread
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by bhamav » Sat Sep 06, 2008 1:17 pm
My vote is for A. There's no way that I can deduce E.
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Too Easy

by karthikgmat » Sat Sep 06, 2008 9:47 pm
Its very easy question to be answered.. Even a child answers it isn't it?
A is an apt choice.
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by rajasiddarth » Sat Sep 06, 2008 10:05 pm
to SumitShah!!!!!

y-x<0

y=2, x=4

-2<0

So, the condition is true.. thn how can you eliminate A??
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by Stockmoose16 » Tue Sep 09, 2008 3:35 pm
I think the answer is A, too.
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by gmatrant » Tue Sep 09, 2008 6:41 pm
The question was given to me by a friend of mine.. sorry not sure from where..
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