Final answer:
International priority express delivery typically takes 1-3 days or 3-5 days, depending on the carrier and locations. Specific delivery time can be influenced by factors like customs clearance and efficiency of the courier service.
Step-by-step explanation:
The time taken for international priority express delivery service typically varies depending on the service provider and the specific locations involved in the shipping process. However, the standard time frame for such a service is usually 1-3 days or 3-5 days. For instance, services like UPS Worldwide Express, FedEx International Priority, and DHL Express Worldwide offer delivery within 1-3 business days. The exact time can be influenced by factors such as customs clearance, the exact starting point and destination, and the efficiency of the delivery service.
In the scenario provided, if it is past noon on a delivery day and you're expecting a package, the probability that you must wait at least 1.5 more hours cannot be determined explicitly without additional context. However, most express services offer detailed tracking systems that provide a more accurate expected delivery window.