Double-set Matrix

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Double-set Matrix

by Stockmoose16 » Wed Oct 01, 2008 12:18 pm
Hi,

I'm wondering if there's any way to use a double-set matrix, instead of a Venn Diagram, to solve this problem:

How 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 directors were absent

2) Company K has 12 directors and company R has 8 directors
Source: — Data Sufficiency |