With reference to a 2-dimensional coordinate system, the vertices of a uniform and thin triangular plate are given by (0,0), (1,4) and (-7,8) points. The centroid of the plate is

1. (-2, 4)
2. (2,-4)
3. (-3, 6)
4. none of the above

Explanation: The centroid of the plate is (-2, 4).