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If (4, 2, p) is the centroid of the tetrahedron formed by the points (k, 2, -1), (4, 1, 1), (6, 2, 5) and (3, 3, 3), then k+p=
A. |
`17/3` |
B. |
1 |
C. |
`5/3` |
D. |
5 |
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