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P is the centre of mass of four point ma...

P is the centre of mass of four point masses A,B, C and D which are lying in the same length but not along the same straight line then.

A

P may or may not coincide with one of the point masses.

B

P must lie within the quadrilatered ABCD.

C

P must lie within or on the edge of at least one of the tringles formed by taking A, B, C and three at a time

D

P must lie on a line joined two of the points A, B, C, D.

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The correct Answer is:
a, c
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