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#1 2015-06-02 09:01:37

husnain
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From: Chichawatni,Pakistan
Registered: 2014-10-03
Posts: 8,129
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Permutation And Combination:

Question:
In how many ways can 8 Indians and, 4 American and 4 Englishmen can be seated in a row so that all person of the same nationality sit together?

Option A):
4! 4!
Option B):
8! 4! 4!
Option C):
3! 4! 8! 4! 
Option D):
3! 8!

Correct Answer is Option C):
3! 4! 8! 4! 

Explanation:
Taking all person of same nationality as one person, then we will have only three people.
These three person can be arranged themselves in 3! Ways.
8 Indians can be arranged themselves in 8! Way.
4 American can be arranged themselves in 4! Ways.
4 Englishman can be arranged themselves in 4! Ways.
Hence, required number of ways = 3!*8!*4!*4! Ways.


You cannot discover the new oceans unless you have the courage to lose the sight of the shore.

2015-06-02 09:01:37

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Re: Permutation And Combination:



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