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11 Aug 2016, 02:42
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D
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:
63% (01:48) correct
37%
(01:56)
wrong
based on 314
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In how many different ways can 8 people be seated in a room with 10 chairs?
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
11 Aug 2016, 02:47
Kudos
Bookmarks
EBITDA
In how many different ways can 8 people be seated in a room with 10 chairs?
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
\(10P8 = \frac{10!}{(10-8)!} = 1,814,400\), choosing 8 out of 10, when order matters.
Answer: D.
11 Aug 2016, 04:13
Kudos
Bookmarks
EBITDA
In how many different ways can 8 people be seated in a room with 10 chairs?
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
A) 40,320
B) 181,440
C) 403,200
D) 1,814,400
E) 3,628,800
Please explain in detail your answer so that we can all follow it.
Order doesn't matter
With 10 chairs and only 8 to seat
8!- Number of ways the 8 can seat on the chair
10C2 - Number of ways the 2 empty sits can be vary with the 8 seated
8! * 10C2 = 1,814,400 Answer - D
