Answer: 4
Step-by-step explanation:
The average fixed cost is calculated as:
= Fixed cost / output
Since total cost is given as TC = 100 + 5Q, the fixed cost in this case is 100 as.it doesn't depend on output. In this case, 5Q is the variable cost.
Since average fixed cost is calculated as:
= Fixed cost / output
= 100 / 25
= 4
Therefore, the average fixed cost is 4