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OG11/49

by japan1453 » Mon Dec 22, 2008 3:27 pm
OG11/49How many people are directors of both Company K
and Company R?

(1) There were 17 directors present at a joint
meeting of the directors of Company K and
Company R, and no director were absent.

(2) Company K has 12 directors and company R
has 8 directors.



Could you explain this? C
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Source: — Data Sufficiency |
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by dmateer25 » Mon Dec 22, 2008 3:38 pm
Stmt 1 tells us that there are 17 directors total at the meeting an none are absent. We don't know how many are directors for each company though.

Setting up the formula for overlapping sets we would have

17 = k + r + 0 - both

Insufficient

Stmt 2:

Tells us how many directors for each company.

Total = 12 + 8 + 0 - both

Two unknowns so we can't solve.


Together:

17 = 12 + 8 + 0 - both

17 = 20 - both

both = 3


Choose C
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by japan1453 » Mon Dec 22, 2008 3:51 pm
Thanks "dmateer25" for the detailed explanations. You really want to beat GMAT.
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