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Grade: 11

                        

In how many ways can 7 persons form a ring? In how many ways can 7 Englishmen and 7 Americans sit down at a round table, no two Americans being together?

2 years ago

Answers : (1)

Arun
24737 Points
							
Dear student
 
No of ways of forming a ring by 7 persons = (7 – 1)!
 
 = 6!
 = 720
 
Total no of ways of seating 7 english men and 7 americans when two americans are not together = 7 ! * 6!
 
 = 5040 * 720 = 3628800
 
 
Regards
Arun (askIITians forum expert)
2 years ago
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