Dental If incidence = 50 cases/1000 population/year and mean duration of disease = 5 years, then prevalence would be: A 10 B 250 C 10-Jan D 1/250 💡 Explanation If incidence = 50 cases/1000 population/year and mean duration of disease = 5 years, then prevalence would be: ✓ Correct Answer: B. 250