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If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0

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If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 21 Apr 2017, 07:55
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Question Stats:

50% (01:53) correct 50% (01:36) wrong based on 77 sessions

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Kudos [?]: 129047 [1], given: 12187

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Re: If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 21 Apr 2017, 08:03
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given 3x+4y<0
statement 1st: provided y> 0, x has to be negative to satisfy the question stem => sufficient
statement 2nd : 3x +5y =20 but 3x+4y <0 => y>0 => x<0 => sufficient
option-D

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Re: If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 21 Apr 2017, 08:49
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attari92 wrote:
given 3x+4y<0
statement 1st: provided y> 0, x has to be negative to satisfy the question stem => sufficient
statement 2nd : 3x +5y =20 but 3x+4y <0 => y>0 => x<0 => sufficient
option-D


hi can u explain ur statement 2

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Re: If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 22 Apr 2017, 00:37
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attari92 wrote:
given 3x+4y<0
statement 1st: provided y> 0, x has to be negative to satisfy the question stem => sufficient
statement 2nd : 3x +5y =20 but 3x+4y <0 => y>0 => x<0 => sufficient
option-D

IMO A

since we dont know the sign of y in statement 2 so we can say anything about answer being D

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Re: If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 22 Apr 2017, 07:15
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varundixitmro2512 wrote:
attari92 wrote:
given 3x+4y<0
statement 1st: provided y> 0, x has to be negative to satisfy the question stem => sufficient
statement 2nd : 3x +5y =20 but 3x+4y <0 => y>0 => x<0 => sufficient
option-D

IMO A

since we dont know the sign of y in statement 2 so we can say anything about answer being D



look, it's been mentioned in the question stem that 3x+4y<0 but how come 3x + 4y +y =20 ? It means that the negative part (3x+4y) ought to be added with a positive 'y' in order to make the expression equals 20 , you see

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If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0 [#permalink]

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New post 10 Sep 2017, 10:32
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A. -3x>4y - statement 1 - y>0, means -3x>a where a is 4y which is a positive value and for -3x to be greater than the positive value x shall be < 0. Hence sufficient.
Statement 2 - 3x+5y=20 which is also an equation of a decreasing line as the slope is negative and the values for the (x,y) pair can be (-10,10), (-5,7), (0,4), (5,1), (10,-2) where can be negative or less than zero but it can also be positive but for all positive values of x the equation -3x>4y will not be satisfied hence x can only be <0. Hence statement 2 is sufficient. So answer is D

sorry missed an important point there so updated the response. correct answer is D.

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If -3x > 4y, is x < 0? (1) y > 0 (2) 3x + 5y – 20 = 0   [#permalink] 10 Sep 2017, 10:32
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