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Updated on: 31 Jan 2013, 04:36
Originally posted by antoxavier on 30 Jan 2013, 23:41.
Last edited by Bunuel on 31 Jan 2013, 04:36, edited 2 times in total.
Last edited by Bunuel on 31 Jan 2013, 04:36, edited 2 times in total.
Renamed the topic and edited the question.
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
64% (01:44) correct
36%
(01:54)
wrong
based on 299
sessions
History
Date
Time
Result
Not Attempted Yet
36 identical chairs must be arranged in rows with the same number of chairs in each row. Each row must contain at least three chairs and there must be at least three rows. A row is parallel to the front of the room. How many different arrangements are possible?
A. 2
B. 4
C. 5
D. 6
E. 10
A. 2
B. 4
C. 5
D. 6
E. 10
31 Jan 2013, 04:38
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Bookmarks
antoxavier
36 identical chairs must be arranged in rows with the same number of chairs in each row. Each row must contain at least three chairs and there must be at least three rows. A row is parallel to the front of the room. How many different arrangements are possible?
A. 2
B. 4
C. 5
D. 6
E. 10
A. 2
B. 4
C. 5
D. 6
E. 10
We should have at least 3 rows and at least 3 chairs in a row:
# OF ROWS --- # OF CHAIRS IN A ROW
3 --------------------------------- 12
4 ---------------------------------- 9
6 ---------------------------------- 6
9 ---------------------------------- 4
12 -------------------------------- 3
Total of 5 ways.
Answer: C.
Hope it's clear.
P.S. P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention to the rule #3 (the name of a topic MUST be the first 40 characters (~the first two sentences) of the question).
Luckisnoexcuse
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Last visit: 16 Apr 2022
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Given Kudos: 198
Concentration: Strategy, Technology
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02 Nov 2017, 23:34
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Bunuel
Thirty-six identical chairs must be arranged in rows with the same number of chairs in each row. Each row must contain at least 3 chairs, and there must be at least 3 rows. A row is parallel to the front of the room. How many different arrangements are possible?
(A) 2
(B) 4
(C) 5
(D) 6
(E) 10
r>=3, c>=3(A) 2
(B) 4
(C) 5
(D) 6
(E) 10
(r,c) = (3,12), (4,9), (6,6), (9,4), (12,3)
C
