<prompt> The prevalence of dental caries in a community in the year 2000 and 2003 was 18 and 38 respectively. The incidence of caries for the same population in three years would be:38201056  <response>: Hint:Incidence No. of new cases in a specified time 38-18 20Prevalence Incidence x Duration. Incidence Prevalence Duration PD. 