One.
One, and ten people to stand around clapping and saying "Aww, how brave."
Only one, but they have to turn it on and off 50 times before they're sure it's fixed.
Anti feminists Nah, they can't screw
As much people as is needed to screw that lightbulb.
Ohm...
Just one, but doing it will make them think they're going to be an electrician in the future.