Should We Risk it?

It's been four days since our dinner party, and our leftovers are still in the fridge. We can't decide if it would be a good idea to eat them, or if they've gone bad. We looked online and found that 8 people found chicken parmesan to be spoiled after four days, and 5 people found it to be just fine. Based on these results, what is the probability that our food is spoiled?