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Question

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.

A
Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
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B
Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
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C
Both statements together are sufficient, but neither statement alone is sufficient.
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D
Each statement alone is sufficient.
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E
Statements (1) and (2) together are not sufficient.
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Solution

The correct option is C Both statements together are sufficient, but neither statement alone is sufficient.
  1. Statement 1 clarifies that Company K and Company R together have 17 individuals serving as directors. However, there is no information as to the distribution of the Company K directors, the Company R directors, and the joint directors; NOT sufficient.
  2. From statement 2 we get the number of directors in each company but no information as to the number of joint directors; NOT sufficient.
  • Taking (1) and (2) together, it is known from (2) that there are 20 directorships in all. If at a joint meeting, there are only 17 people present, then 2017=3 people must be joint directors. Thus, both statements together are sufficient, but neither statement alone is sufficient.

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