Everybody in a room shakes hand with everybody else. The total number – McqOptions

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1.	Everybody in a room shakes hand with everybody else. The total number of hand shakes is 66. The total number of persons in the room is [MNR 1991; Kurukshetra CEE 1998; Kerala (Engg.) 2001]
A.	11
B.	12
C.	13
D.	14
Answer» C. 13

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