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Three men A,B, C and two women X, Y are to be seated

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Joined: 17 Dec 2012
Posts: 622
Location: India
Three men A,B, C and two women X, Y are to be seated  [#permalink]

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New post 02 May 2016, 21:05
1
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A
B
C
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Difficulty:

  65% (hard)

Question Stats:

54% (02:02) correct 46% (02:00) wrong based on 41 sessions

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Three men A,B, C and two women X, Y are to be seated in one row. Of all the seating arrangements possible, in how many of them X sits to the immediate left of one of the men?

A. 12
B. 48
C. 60
D. 72
E. 96

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Re: Three men A,B, C and two women X, Y are to be seated  [#permalink]

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New post 02 May 2016, 21:20
SravnaTestPrep wrote:
Three men A,B, C and two women X, Y are to be seated in one row. Of all the seating arrangements possible, in how many of them X sits to the immediate left of one of the men?

A. 12
B. 48
C. 60
D. 72
E. 96


Hi,

there can be many ways..

most simplest is..


take Men, X as one combination..
so total seats now are 4...
so ways 4 can be arranged is 4!..
but the men can be A, B or C, so 3 ways..
answer = 4!*3 = 24*3 = 72..

another way


total ways = 5! = 120..
lets see how many ways she will not be sitting in immediate left to a men..
1) let her sit on immediate left to Y..
so YX is ONE combination..
total 4!,
2) 2nd case will be when she sits on the left most so another 4!..
total 4!+4! = 48

answer = 120-48 = 72
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Re: Three men A,B, C and two women X, Y are to be seated   [#permalink] 02 May 2016, 21:20
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Three men A,B, C and two women X, Y are to be seated

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