Three point masses of `1kg`, `2kg` and `3kg` lie at `(0,0)`, `(1,2)`, – InterviewSolution

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1.	Three point masses of `1kg`, `2kg` and `3kg` lie at `(0,0)`, `(1,2)`, `(3,-1)` respectively. Calculate the coordinates of the centre of mass of the system.
Answer» `x_(cm)=(1xx0+2xx1+9)/(6)=(11)/(6)` `y_(cm)=(1xx0+2xx2-1xx3)/(6)=(4-3)/(6)=(1)/(6)` `(x_(cm),y_(cm))=((11)/(6),(1)/(6))`

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