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Is a b + c > 0? 06 May 2016, 04:40
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C
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35% (medium)

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69% (00:49) correct 31% (00:51) wrong based on 16 sessions

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Is a – b + c > 0?

(1) a + c > 0
(2) b < 0



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C
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Is a b + c > 0? 06 May 2016, 04:52
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Bunuel
Is a – b + c > 0?

(1) a + c > 0
(2) b < 0
Show more

since we are dealing with 3 variables and statements I and II talk of either 1 or the other two variable, individually they are NOT suff..

combined..


(1) a + c > 0
(2) b < 0 or -b>0..
now we have two eq in greater than, so we can add them..
\(a+c-b>0+0............\\
a-b+c>0\)...
Suff
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Is a b + c > 0? 06 May 2016, 20:01
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1) a + c > 0
no clue on value of B ..insufficient
(2) b < 0
no clue on value of A and C...insufficient
1+2) b is negative and a+c is positive
thus
a+c-(-b) >0
Sufficient
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Is a b + c > 0? 06 May 2016, 22:33
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both not sufficient alone

line up:

a+c>0
- b<0
_______
a+c-b>0

C
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Is a b + c > 0? 07 May 2016, 00:09
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chetan2u
Bunuel
Is a – b + c > 0?

(1) a + c > 0
(2) b < 0

since we are dealing with 3 variables and statements I and II talk of either 1 or the other two variable, individually they are NOT suff..

combined..


(1) a + c > 0
(2) b < 0 or -b>0..
now we have two eq in greater than, so we can add them..
\(a+c-b>0+0............\\
a-b+c>0\)...
Suff
Show more


Hi RatneshS
Quote:
It feels like a blunder here in your solution that is algebraic
case 1
a+c>0 let a+c=80 b<0 let -10 combined =80-10=70 so >0

case 2
a+c>0 let a+c=20 b<0 let -50 combines=20-50 so <0

Answer should be E
Show more

Since you have removed this post, I believe you have understood why ans is C and why the solution is OK..
If not please post the query
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Is a b + c > 0? 07 May 2016, 00:26
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chetan2u
chetan2u
Bunuel
Is a – b + c > 0?

(1) a + c > 0
(2) b < 0

since we are dealing with 3 variables and statements I and II talk of either 1 or the other two variable, individually they are NOT suff..

combined..


(1) a + c > 0
(2) b < 0 or -b>0..
now we have two eq in greater than, so we can add them..
\(a+c-b>0+0............\\
a-b+c>0\)...
Suff


Hi RatneshS
Quote:
It feels like a blunder here in your solution that is algebraic
case 1
a+c>0 let a+c=80 b<0 let -10 combined =80-10=70 so >0

case 2
a+c>0 let a+c=20 b<0 let -50 combines=20-50 so <0

Answer should be E

Since you have removed this post, I believe you have understood why ans is C and why the solution is OK..
If not please post the query
Show more

I understood Chetan...I undermined the negative sign :)
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Is a b + c > 0? 07 May 2016, 04:49
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[quote="Bunuel"]Is a – b + c > 0?

(1) a + c > 0
(2) b 0
Answer C.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Thank you for understanding, and happy exploring!
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