Final answer:
The prior probability that the randomly selected adult from the county is a female is 48%.
Step-by-step explanation:
If 52% of the adults in the county are males, then the remaining percentage represents the females. We can calculate the probability that the selected person is a female by subtracting the percentage of males from 100%.
The prior probability that the selected adult is a female is given by:
Therefore, the prior probability that the randomly selected person is a female is 0.48 or 48%.