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1. The prevalence rate per 100,000 is 99.8%

   We know that the prevalence rate is the proportion of persons in a population who have a particular disease over a specified period of time.

   In this question, we have been given a data on breast cancer for the past year:

   number of new cases: 1,774;

   number of total cases: 4,192;

   population: 5,977,906

   We need to find the prevalence rate per 100,000

   The total number of infected people = 1,774 + 4192

                                                                = 5966

   Chance of infection in the whole population would be,

   5,977,906/ 5966 ≈ 1002

   This means, chances of having breast cancer is 1 in every 1002 people.

   A prevalence rate is calculated by dividing total number of infected people by the total population. The result is then multiplied by 100,000

   Now we calculate the prevalence rate per 100,000

   = (5966 / 5,977,906) × 100,000

   = 0.000998 × 100,000

   = 99.8 %

   Therefore, the prevalence rate per 100,000 is 99.8%

   Learn more about the prevalence rate here:

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