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A plane meets the coordinate axes at P, ...

A plane meets the coordinate axes at P, Q and R such that the centroid of the triangle is (3,3,3). The equation of he plane is (A) `x+y+z=9` (B) `x+y+z=1` (C) `x+y+z=3` (D) `3x+3y+3z=1`

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