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In a pie chart showing the types of pets owned by families, 40% have dogs, 30% h

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Question: In a pie chart showing the types of pets owned by families, 40% have dogs, 30% have cats, 20% have birds, and 10% have reptiles. If there are 80 families surveyed, how many have dogs?

Options:

  1. 20
  2. 30
  3. 40
  4. 50

Correct Answer: 40

Solution: 

40% of 80 families is 0.40 * 80 = 32 families have dogs.

In a pie chart showing the types of pets owned by families, 40% have dogs, 30% h

Practice Questions

Q1
In a pie chart showing the types of pets owned by families, 40% have dogs, 30% have cats, 20% have birds, and 10% have reptiles. If there are 80 families surveyed, how many have dogs?
  1. 20
  2. 30
  3. 40
  4. 50

Questions & Step-by-Step Solutions

In a pie chart showing the types of pets owned by families, 40% have dogs, 30% have cats, 20% have birds, and 10% have reptiles. If there are 80 families surveyed, how many have dogs?
  • Step 1: Understand that 40% means 40 out of every 100 parts.
  • Step 2: Know that there are 80 families surveyed.
  • Step 3: To find out how many families have dogs, calculate 40% of 80.
  • Step 4: Convert 40% to a decimal by dividing 40 by 100, which gives you 0.40.
  • Step 5: Multiply 0.40 by 80 to find the number of families with dogs: 0.40 * 80.
  • Step 6: Calculate the result: 0.40 * 80 = 32.
  • Step 7: Conclude that 32 families have dogs.
  • Percentage Calculation – Understanding how to calculate a percentage of a total number.
  • Basic Arithmetic – Applying multiplication to find the number of families based on the percentage.
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