Answer
(p ∨ q) → ~r
Work Step by Step
p: The lines go down.
q: The transformer blows.
r: We have power.
If the lines go down or the transformer blows, then we do not have power.
The symbolic representation is:
p ∨ q: The lines go down or the transformer blows.
(p ∨ q) → ~r: If the lines go down or the transformer blows, then we do not have power