10.
If it is rolling a six as in a dice, then it would not be the same probability as getting heads on a coin because the probability of rolling a six on a dice wiuld be a 1/6 probability. Flipping a coin and getting heads would be a 1/2 probability.
11.
Donald can do this because on a standard dice, the probability of rolling one number is 1/6. (If it would be the probability of rolling an even number, it would be 3/6, which simplifies to 1/2, in case you didn't know or weren't sure.)
Hope I helped!!