There's no right answer. It all depends on a number of factors and conditions. Obviously, you can't stop doing anything, since the very fact of doing nothing would also kill people and obviously it is an option you would take.

Most people save all five people.

Another person, Judith Jarvis Thomson, decided to change the dilemma and got different answers. In this one, there is a train that is going to kill 5 people, but the difference is that you don't drive the train. The only way for you to save the 5 people is to push a fat guy who will fall on the track and derail the train. Obviously, you will be killing one person.

In this experiment most didn't dare push the fat one.

Will you?

Cheers