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The co-ordinates of the centroid of a triangle ABC are (-1 , 4). What are the co-ordinates of vertex C if co-ordinates of A and B are (-3 , -1) and (3 , 5) respectively?

(-3 , 8)
(3 , 8)
(-3 , -8)
(3 , -8)

Correct Answer: (-3 , 8)

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