We Have a Hollow Metallic Sphere with Charge +5

Multiple Choice

We have a hollow metallic sphere with charge +5.0 µC and radius 5.0 cm.We insert a −10 µC charge at the center of the sphere through a hole in the surface.What charge now rests on the outer surface of the sphere?

A) +10 µC
B) +5 µC
C) −5 µC
D) +15 µC