Question

If the centroid of triangle whose vertices are (a,1, 3), (– 2, b, –5) and (4, 7, c) be the origin, then the values of a, b, c are

• A. – 2, –8, –2
• B. 2, 8, –2
• C. –2, –8, 2
• D. 7, –1, 0

Answer 1

The correct option is C

–2, –8, 2

$0=\frac{a-2+4}{3}\Rightarrow a=-2,0=\frac{1+b+7}{3}\Rightarrow b=-8and0=\frac{3-5+c}{3}\Rightarrow c=2.$