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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? 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?
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 RegardsArun (askIITians forum expert)
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