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prep question

by jamesk486 » Wed May 30, 2007 6:29 pm
A line of people waiting to enter a theater consists of 7 separate and successive groups. The first person in each group purchases one ticket for each person in the group and for no one else. If n is the total number of tickets sold for the first 6 groups, is n an even group?
(1) there are no more than 4 people in each group
(2) the 19th person in line purchases the tickets for the 7th group
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Source: — Data Sufficiency |
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by jayhawk2001 » Wed May 30, 2007 9:03 pm
B?

(2) is sufficient. 18 people in front of the 7th group - n is even.
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