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A certain disease affects 1 in every 1000 people. If a town has a population of

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Question: A certain disease affects 1 in every 1000 people. If a town has a population of 10,000, how many people are expected to be affected? (2021)

Options:

  1. 5
  2. 10
  3. 15
  4. 20

Correct Answer: 10

Exam Year: 2021

Solution: 

Expected number of affected people = (1/1000) × 10,000 = 10.

A certain disease affects 1 in every 1000 people. If a town has a population of

Practice Questions

Q1
A certain disease affects 1 in every 1000 people. If a town has a population of 10,000, how many people are expected to be affected? (2021)
  1. 5
  2. 10
  3. 15
  4. 20

Questions & Step-by-Step Solutions

A certain disease affects 1 in every 1000 people. If a town has a population of 10,000, how many people are expected to be affected? (2021)
  • Step 1: Understand that the disease affects 1 out of every 1000 people.
  • Step 2: Identify the total population of the town, which is 10,000 people.
  • Step 3: To find out how many people are affected, use the formula: (Number of people affected per 1000) × (Total population).
  • Step 4: Substitute the values into the formula: (1/1000) × 10,000.
  • Step 5: Calculate the result: 10,000 divided by 1000 equals 10.
  • Step 6: Conclude that 10 people are expected to be affected by the disease in the town.
  • Probability and Proportions – Understanding how to calculate expected values based on given probabilities and population sizes.
  • Basic Arithmetic – Applying multiplication to find the expected number of affected individuals.
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