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Given: | 10y - 4 | > 7 and y < 1 Can y be -.8

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CEO
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Joined: 21 Jan 2007
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Given: | 10y - 4 | > 7 and y < 1 Can y be -.8 [#permalink] New post 14 Oct 2007, 03:07
Given:

| 10y - 4 | > 7
and
y < 1

Can y be -.8?
Senior Manager
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Re: Absolute Inequalities [#permalink] New post 14 Oct 2007, 03:25
I wud go for B - Info II is suff...

Info 1 - gives y>1.1 & y<-0.3 INSUFF - ANS y CAN/CANNOT be -0.8
Info 2 - gives y<1 SUFF - ANS y CAN be -0.8
SVP
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 [#permalink] New post 14 Oct 2007, 04:41
(D) for me :)

Stat 1
| 10y - 4 | > 7

o If y >= 4/10 = 2/5
| 10y - 4 | > 7
<=> 10*y - 4 > 7
<=> y > 11/10 >>>>> OK

o If y < 4/10 = 2/5
| 10y - 4 | > 7
<=> -(10*y - 4) > 7
<=> y < -3/10 >>>>> OK

Solutions are y < - 3/10 OR y > 11/10

Finally
-0.8 = -8/10 < - 3/10

SUFF.

Stat 2
y < 1
and -0.8 = -8/10 < 1

SUFF.
Senior Manager
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 [#permalink] New post 14 Oct 2007, 07:15
Another D,

Just plugged in the value and see whether it satisfies equation, and it does in both cases.

Ans: D
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Re: Absolute Inequalities [#permalink] New post 18 Oct 2007, 20:13
bmwhype2 wrote:
Given:

| 10y - 4 | > 7
and
y < 1

Can y be -.8?


One more for D

Just plug in if the inequality is true then y can be -0.8
Re: Absolute Inequalities   [#permalink] 18 Oct 2007, 20:13
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Given: | 10y - 4 | > 7 and y < 1 Can y be -.8

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