The question is, do they mean
Or, do they mean
In the absence of brackets to clarify, mathematical convention would suggest that option (1) is the correct interpretation since the division symbol pertains to the first operand on its right. In our case, it's a 2. If they had intended option (2), then they would have to enclose 2(9+3) all in brackets, as in
The problem is we don't know the mathematical sophistication of the person who came up with the question. How many times have I seen a "skill testing question" that looks something like this...
Following standard mathematical convention, my answer would be 16.166666... But, somehow that's less satisfying than the unconventional answer of 3.