Final answer:
About 20 percent of state and federal prisoners have a diagnosable mental illness, and about 5 percent have a diagnosable severe mental illness.
Step-by-step explanation:
Mental illness among prisoners is a complex and challenging issue that intersects with various social, legal, and health-related factors. Individuals within the prison system may experience mental health conditions ranging from common disorders to severe illnesses.
About 20 percent of state and federal prisoners have a diagnosable mental illness, and about 5 percent have a diagnosable severe mental illness.