N persons stand on the circumference of circle at distinct points. eac – McqOptions

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1.	N persons stand on the circumference of circle at distinct points. each possible pair of persons, not standing next to each other, sings a two-minute song one pair after the other. if the total time taken for singing is 28 minutes,what is N?
A.	5
B.	7
C.	9
D.	None of these
Answer» C. 9

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