Final answer:
The discriminatory ads, an answer cannot be provided for that part. However, concerning children cleaning their rooms, with the time uniformly distributed from 1 to 15 days, the expected waiting time for a parent is calculated to be 8 days.
Step-by-step explanation:
To remove discriminatory ads within a certain number of working days. It does not provide sufficient context or information to give a specific number of days. However, the information provided about the time it takes for children to clean their rooms is a probability problem. If the time taken for children to clean their rooms is uniformly distributed over the interval from one to 15 days, then the expected value or the mean of this uniform distribution can be calculated using the formula for the average of a uniform distribution:
Expected value (mean) = (a + b) / 2
Where 'a' is the minimum value and 'b' is the maximum value. In this case, 'a' is 1 day and 'b' is 15 days, so the calculation is (1 + 15) / 2 = 16 / 2 = 8 days.
Therefore, the answer is A. 8 days. This is how long a parent can expect to wait for their children to clean their rooms.