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Is |x| = y - z ?

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by rajeshsinghgmat » Mon Feb 25, 2013 10:54 pm
C the answer.
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by manasgoswami1 » Thu Aug 15, 2013 10:49 pm
hi,

i have a query here. if i consider condition 1 then i can say

y=z-x
substituting in question i get |x|=y-z=z-x-z

which is |x|= -x

which can never be the case as mod of any value is not negative.

so can't i infer that statement 1 is sufficient??
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by Java_85 » Fri Aug 16, 2013 3:25 pm
manasgoswami1 wrote:hi,

i have a query here. if i consider condition 1 then i can say

y=z-x
substituting in question i get |x|=y-z=z-x-z

which is |x|= -x

which can never be the case as mod of any value is not negative.

so can't i infer that statement 1 is sufficient??
No, You can't say that, simply put x=-1 then the statement is right, now put x=1 it's not right, therefore statement 1 is not enough.
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by manasgoswami1 » Sun Aug 18, 2013 8:44 pm
thanks:)
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by swathi8388 » Wed Aug 21, 2013 1:43 am
I felt this problem to be pretty simple.

question asks whether |x|=y-z? rephrasing it gives : -x=y-z ? or x=y-z ?

1. gives us x+y=z
=> x=z-y
=> -x=y-z

2. x<0 so it is negetive

both together gives us the information needed, i.e x is negetive , hence -x=y-z is true
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by jaspreetsra » Sun Nov 09, 2014 12:40 pm
Ans: C
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by deepak4mba » Fri Apr 06, 2018 12:48 am
E
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