If a certain disease affects 1 in every 1000 people, what is the expected number

If a certain disease affects 1 in every 1000 people, what is the expected number of cases in a population of 50,000? (2020)

If a certain disease affects 1 in every 1000 people, what is the expected number of cases in a population of 50,000? (2020)

Step 1: Understand that the disease affects 1 out of every 1000 people.
Step 2: Identify the total population you are looking at, which is 50,000 people.
Step 3: To find the expected number of cases, you need to calculate how many groups of 1000 are in 50,000.
Step 4: Divide the total population (50,000) by the number of people affected (1000): 50,000 / 1000 = 50.
Step 5: Since 1 person in each group of 1000 is expected to have the disease, the expected number of cases is 50 groups x 1 case per group = 50 cases.

Probability and Expected Value – Understanding how to calculate expected cases based on probability and population size.