Position vector of the centre of mass of a system of N particles of to

1.	Position vector of the centre of mass of a system of N particles of total mass M is
Answer» `(SUM^(vecMr)p)/(M)` `sum_((p=1)/(R))^(N)vecr_(p)` `(sum_((p=1)/(r))^(N)m_(p)vecr_(p))/(sum_(p=1)^(N)m_(p))` `(sum_((p=1)/(r))^(N)m_(p)vecr_(p))/(sum_(p=1)^(N)r_(p))` ANSWER :C

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