Question

If a vertex of a triangle is (1, 1) and the mid points of two sides through this vertex are (–1, 2) and (3, 2) then the centroid of the triangle is
$(a) \bigg \lgroup -1,\frac{7}{3}\bigg \rgroup \\(b) \bigg \lgroup \frac{-1}{3},\frac{7}{3}\bigg \rgroup \\(c) \bigg \lgroup 1,\frac{7}{3}\bigg \rgroup \\(d) \bigg \lgroup \frac{1}{3},\frac{7}{3}\bigg \rgroup$

Answer 1

here's the complete solution