(A) : The centre of mass of system of n particles is the weight average of the position vector of the n particles making up the system.
(R ) : The position of the centre of mass of a system is independent of co-ordinate system.

Options

A. Both (A) and (R ) are true and (R ) is the correct explanation of (A)
B. Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
C. (A) is true but (R ) is false
D. Both (A) and (R ) are false

Answer

B