How much should a 11-year-old get paid for babysitting?

I would be concerned with a 10-year-old being left in charge of younger kids. They have limited ability to control others and don't have the experience to cover emergencies.

You should not have a 10 year old baby sitting, as they are still not responsible enough to look after children that are younger than them, especially babies. You have to be 14 years of age to babysit! :)