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10 Jun 2008, 18:17
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N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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wrong
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A total of 100 customers purchased books at a certain bookstore last week. If these
customers purchased a total of 200 books, how many of the customers purchased only 1
book each?
(1) None of the customers purchased more than 3 books.
(2) 20 of the customers purchased only 2 books each.
customers purchased a total of 200 books, how many of the customers purchased only 1
book each?
(1) None of the customers purchased more than 3 books.
(2) 20 of the customers purchased only 2 books each.
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10 Jun 2008, 18:53
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C
statement 1:
x = bought 1 book
y = bought 2 books
z = bought 3 books
1x + 2y + 3z = 2 (x + y + z)
x = z
Insuff
statment 2: Insuff, because some may purchase 4 or 5 books
together: x + y = 80, and x = y = 40
I don't know if a person that walked into the store but did not buy a book woud be considered as a "customer".
statement 1:
x = bought 1 book
y = bought 2 books
z = bought 3 books
1x + 2y + 3z = 2 (x + y + z)
x = z
Insuff
statment 2: Insuff, because some may purchase 4 or 5 books
together: x + y = 80, and x = y = 40
I don't know if a person that walked into the store but did not buy a book woud be considered as a "customer".
26 Jun 2008, 00:07
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I don't get how the OA can be C.
Together with both statements, we don't know how many customers buy exactly one book or how many bought exactly three books. Shouldn't the answer be E? Can someone explain?
Together with both statements, we don't know how many customers buy exactly one book or how many bought exactly three books. Shouldn't the answer be E? Can someone explain?
