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P is the centre of mass of a system of f...

P is the centre of mass of a system of four point masses A,B,C and D, which are coplanar but not collinear.
(a) P may or may not coincide with one of the point masses
(b) P must lie within or on the edge of atleast one of the triangles formed by taking A,B, C and D three at a time
(c ) P must lie on a line joining two of the points A,B,C,D
(d ) P lies out side the quadrangle ABCD

A

a & b are correct

B

c&d are correct

C

a & c are correct

D

b & d are correct

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The correct Answer is:
A
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