A company is hosting a welcome lunch for all 28 of their recently hired employees, including 23 from the human resources department. The company wants the employees to intermingle, and not just socialize with their own department. If the event organizer randomly selected 25 of the new employees to sit at a table together, what is the probability that exactly 21 of the chosen employees are from the human resources department? Write your answer as a decimal rounded to four decimal places