There is a war or similar very serious calamity going on. Every household must contribute to the effort to stop it. You must choose for your household, and are not given the chance to consult anyone else about it. What do you choose?
Your [eldest, if applicable] child goes. There is a 50% chance they will die.
Your SO goes. There is a 65% chance that they will die.
You go. There is a 75% chance that you will die.