If the vertices of a triangle be (a, 1), (b, 3) and (4, c), then the centroid of the triangle will lie on x-axis, if

a + c = -4

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a + b = -4

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c = -4

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b + c = -4

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Solution

The correct option is C
c = -4

The point lies on axis of x, if y = 0.

Therefore, $\frac{1 + 3 + c}{3}$ = 0 $\Rightarrow$ c = -4.

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