Question

If Origin is the centroid of a triangle A(a,1,3), B(-2,b,-5) and C(4,7,c), then values of a,b and c will be respectively.

• A. -2,-8,2
• B. 2,8,2
• C. -2,8,2
• D. 2,8,-2

Answer 1

The correct option is A -2,-8,2

As the Origin is the Centroid of the given triangle.
$\therefore \frac{a-2+4}{3}=0\Rightarrow a=-2\frac{1+b+7}{3}=0\Rightarrow b=-8\frac{3-5+c}{3}=0\Rightarrow c=2$