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Choose the correct option.
23 people are there, they are shaking hands together, how many hand shakes possible, if they are in pair of cyclic sequence.
A23
B20
C22
D1
ENone of these
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SHORTCUT
n-people then arrange in Cyclic way. Possibilities is: (n-1)
here 23 people then possible is:(23-1)=>22.
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