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Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0

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Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0  [#permalink]

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New post 19 Jul 2019, 00:05
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Question Stats:

48% (01:18) correct 52% (01:34) wrong based on 21 sessions

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Re: Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0  [#permalink]

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New post 20 Jul 2019, 17:03
Can someone please help with the solution here?
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Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0  [#permalink]

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New post Updated on: 21 Jul 2019, 08:32
Bunuel wrote:
Image
Is a + b positive?

(1) The point (a, b) is in Quadrant II.
(2) a − b > 0

Attachment:
2019-07-19_1104.png



#1
The point (a, b) is in Quadrant II.
x = a and y=b
x will always be -ve and y would be +ve
but
a+b may or may not be +ve as (-3,+5) ; a+b ; 2 or (-3,1) a+b ; -2
insufficient
#2
a − b > 0
only possible when a>b when b can be +ve or -ve
insufficeint
from 1 & 2

Bunuel could you please provide solution to this question , not able to understand the co relation between given graph and relation in stmnt 1 & 2
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Originally posted by Archit3110 on 21 Jul 2019, 03:26.
Last edited by Archit3110 on 21 Jul 2019, 08:32, edited 1 time in total.
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Re: Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0  [#permalink]

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New post 21 Jul 2019, 08:22
In your case, a=-3 and b=+5, hence a-b = -8 which is contradictory to the statement that a-b>0 right?
So, how can we say that we can derive the answer based on 1 and 2 taken together?

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Re: Is a + b positive? (1) The point (a, b) is in Quadrant II (2) a − b >0   [#permalink] 21 Jul 2019, 08:22
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