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Is xy > 40? (1) -9 < x < 5 (2) -5 < y < 8

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Joined: 02 Sep 2009
Posts: 47983
Is xy > 40? (1) -9 < x < 5 (2) -5 < y < 8  [#permalink]

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New post 07 Dec 2017, 21:21
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

78% (00:38) correct 22% (00:35) wrong based on 37 sessions

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Re: Is xy > 40? (1) -9 < x < 5 (2) -5 < y < 8  [#permalink]

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New post 07 Dec 2017, 23:05
1
First statement doesnt tell us anything about y, second statement doesnt tell us anything about x. So none of the statements is individually sufficient to answer the question asked. Lets combine the statements.

-9 < x < 5 and -5 < y < 8. Now we can have x=-8.9 and y=-4.9 in which case x*y > 40 but we could have x=0, in which case x*y < 40. So we cant say. Insufficient.

Hence E answer
Re: Is xy > 40? (1) -9 < x < 5 (2) -5 < y < 8 &nbs [#permalink] 07 Dec 2017, 23:05
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