Answer:
0.18
Explanation:
Think of the decimals in the probability column as percentage. So Micheal has a 30% chance of eating the next fry, Lidia would have a 10% chance, so on and so forth.
The percentage will always go up to 100%.
You're given the other people's percentages, but not Ronald.
So in order to find out the answer, add all of the people's numbers, and subtract by one.
Sorry if this isn't a clear explanation. :)