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Three people are to be seated on a bench. How many different sitting

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Three people are to be seated on a bench. How many different sitting  [#permalink]

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New post 10 Jul 2016, 08:39
1
2
00:00
A
B
C
D
E

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  15% (low)

Question Stats:

71% (00:41) correct 29% (00:38) wrong based on 138 sessions

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Re: Three people are to be seated on a bench. How many different sitting  [#permalink]

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New post 10 Jul 2016, 10:46
Possible combinations can be

1. Erik Joe X
2. X Erik Joe
3. Joe Erik X
4. X Joe Erik

Hence, answer is B.

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Re: Three people are to be seated on a bench. How many different sitting  [#permalink]

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New post 10 Jul 2016, 11:14
1
Bunuel wrote:
Three people are to be seated on a bench. How many different sitting arrangements are possible if Erik must sit next to Joe?

A. 2.
B. 4.
C. 6.
D. 8.
E. 10.


Consider E and J one. But, in this arrangement they can sit in two different combinations.

E first and J second or J first and E second.

Total we have (E and J) and third person= 2 arrangements to do.

Total arrangements= 2*2= 4

B is the answer
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Re: Three people are to be seated on a bench. How many different sitting  [#permalink]

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New post 17 Dec 2018, 23:25
1
Consider Eric and joe as one person. Then we have total 2 persons to be seated.
No of ways of doing so = 2 ways
Now, Eric and joe could also be arranged in 2 different ways i.e Erik left to Joe and Erik right to Joe.
Hence, total ways = 2 x 2 = 4
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Re: Three people are to be seated on a bench. How many different sitting   [#permalink] 17 Dec 2018, 23:25
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