Answer:
d) 0.83.
Explanation:
If a group makes a reservation but doesn't show up 20% of the time, the probability that they will show up is 100% - 20% = 80%.
If the restaurant has 10 tables and takes 12 reservations, the probability that it will be able to accommodate everyone is the number of tables divided by the number of reservations, which is 10/12 = 0.83.
So the answer is d) 0.83.