Final answer:
To calculate the hospital infection rate, divide the number of nosocomial infections by the total number of discharges (including adults, children, and newborns). The correct answer is option b) 0.26%.
Step-by-step explanation:
To calculate the hospital infection rate, we need to divide the number of nosocomial infections by the total number of discharges (including both adults and children, as well as newborns). In this case, the total number of discharges is 7,690 (adults and children) + 989 (newborns) = 8,679. The hospital infection rate can be calculated as:
Infection rate = (Number of nosocomial infections / Total number of discharges) * 100
Plugging in the values:
Infection rate = (23 / 8,679) * 100 = 0.26%
Therefore, the correct answer is option b) 0.26%