Answer: 2/3
Step-by-step explanation:
The numbers which are either a multple of a 3 or an even number (or both) are: 2, 3, 4, 6, 8, 9, 10, 12, 14, 15
There are 10 numbers in total which satisfy the conditions.
There are 15 total possiblities which could occur.
Therefore, the probablity is 10/15 which can be reduced to 2/3