Final answer:
The probability that the 8th background check Fionn processes is the first for which the potential employee has not yet interviewed is approximately 0.4592.
Step-by-step explanation:
To find the probability that the 8th background check Fionn processes is the first for which the potential employee has not yet interviewed, we need to calculate the probability that the first 7 checks are for employees who have already interviewed and the 8th check is for an employee who has not yet interviewed.
Since the interview statuses are independent, the probability that any background check is for an employee who has already interviewed is 91% or 0.91. Therefore, the probability that the 8th background check is for an employee who has not yet interviewed is 1 - 0.91^7 ≈ 0.4592.