in how many ways can 8 persons be seated on a round table if two of them want to be together?
with solution please
:)
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in how many ways can 8 persons be seated on a round table if two of them want to be together?
with solution please
:)
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Answer:
in how many ways can 8 persons be seated on a round table if two of them want to be together?
a.360
b.720
c.1440
d.5040
Step-by-step explanation:
Two people seating together is considered 1 element
# of ways of seating 7 people at a round table
= (n-1)! = ( 7-1)! = 6! = 720
but for each way of arranging the 7 people there are 2! ways of of arranging the 2 people
thus total number of ways = 720*2!
= 1440 ways
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