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bacali: Master | Next Rank: 500 Posts; Posts: 245; Joined: Thu Aug 16, 2007 12:41 pm

by bacali » Tue Dec 02, 2008 8:05 am

If xy ≠ 0, what is the value of 1/x + 1/y ?

(1) 1 / (x+y) = -1
(2) xy = 6(x+y)

OA: B

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Source: Beat The GMAT — Data Sufficiency | Tue Dec 02, 2008 8:05 am

bacali: Master | Next Rank: 500 Posts; Posts: 245; Joined: Thu Aug 16, 2007 12:41 pm

by bacali » Tue Dec 02, 2008 8:06 am

pretty simple but still a good one for fundamentals.

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Carloblacksun: Senior | Next Rank: 100 Posts; Posts: 65; Joined: Thu Nov 13, 2008 8:03 am; Location: Paris, France; Thanked: 2 times; GMAT Score:730

by Carloblacksun » Tue Dec 02, 2008 9:21 am

solution of B is -1/6 right?

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