Answer:
The coefficient of a term will be the numerical value in the term.
Here there is no variable but, we consider it like this:
11 = 11x {Here x=1}
Thus the coefficient will be 11 as the coefficient of 11x is 11
Explanation of converting 11 into 11x (will be helpfull if you belong to lower grade):
We know that 11×1 is 11 itself. Thus if we take x with value of 1 then 11x will have the value of 11 itself.