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Question

If the centroid of the triangle with vertices (3,a),(b,8) and (1,3) is (3,1) then find values of a and b.

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Solution

Centroid's coordinates are mean of triangles vertices coordinates
3=3+b+13b+4=9
b=5
a8+33
a5=3
a=2.

1208017_1392651_ans_ff2c408f6f8240088c2bebb1b20df2ad.jpg

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