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pam and ed

by grandh01 » Tue Aug 21, 2012 2:06 pm
Pam and Ed are in a line to
purchase tickets. How many people
are in the line?
(1) There are 20 people behind Pam
and 20 people in front of Ed.
(2) There are 5 people between Pam
and Ed.

OA is E
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Source: — Data Sufficiency |
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by rijul007 » Tue Aug 21, 2012 2:23 pm
grandh01 wrote:Pam and Ed are in a line to
purchase tickets. How many people
are in the line?
(1) There are 20 people behind Pam
and 20 people in front of Ed.
(2) There are 5 people between Pam
and Ed.

OA is E

Clearly the two statements are insufficient individually.
The combination of the two statements is tricky.

Here's a hint:
Lets say,
(1)There are 3 people behind Pam
and 3 people in front of Ed.
(2)There are 1 people between Pam
and Ed.

I have changed the values to make it clearer

On the combining the two statements, the are two arrangements possible
Case 1:
X X X Ed X Pam X X X
Case 2:
X Pam X Ed X

Hence, insufficient
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