Most people arrested in the united states are of what racial-ethnic background

The relationship between race and crime in the United States has been a topic of public controversy and scholarly debate for more than a century The incarceration rate of blacks (African Americans) is more than three times higher than their representation in the general population Research suggests that the over representation of some minorities in the criminal justice system is due to disproportionate crime rates, socioeconomic factors and racial discrimination by the criminal justice system.

3. i would say one, but one is not prime nor composite.