Answer:
0,1,2,3,4,5,6,7,8,9
Explanation:
From the problem statement, from the score which is given as 15._66.
it is only one digit that is missing and not a combination of two digits.
This makes our guess easier as we have a range of 0-9 to guess from
therefore the list of possible digits to select from can be given as
from between 0-9 which is
{0,1,2,3,4,5,6,7,8,9}