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Grade 11Algebra

The number of ways in which 7 girls can stand in a circle so that they do not have same neighbours in any two arrangements?
A.720
B.380
C.360
D.none of these

Profile image of ABC
7 Years agoGrade 11
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1 Answer

Profile image of Arun
7 Years ago
7 persons can be sit around a table in (7 – 1)! = 6! but each person will have the same neighbours in clockwise and anticlockwise arrangements the required number is 6! / 2 = 360

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