My best guess is a 1/225 chance in guess the right combination
If a+b= 2+11 then your sum will be 13.
heres an example...
If you have eleven dollars and I give you 2 more you can simply count up 2 more from 11 leaving you at 13.
you're welcome.
The answer is 14. First, get both numbers and add them twice (2.5+2.5+4.5+4.5) or (2.5 * 2 + 4.5 * 2). Then you should get 2 numbers which are 9 and 5. Then it should be 14, which is the answer.
