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A group of friends went out for dinner. If the average cost per person was $20 a

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Question: A group of friends went out for dinner. If the average cost per person was $20 and there were 5 people, what was the total cost of the dinner? (2023)

Options:

  1. $80
  2. $100
  3. $120
  4. $140

Correct Answer: $100

Exam Year: 2023

Solution: 

Total cost = Average cost per person × Number of people = 20 × 5 = $100.

A group of friends went out for dinner. If the average cost per person was $20 a

Practice Questions

Q1
A group of friends went out for dinner. If the average cost per person was $20 and there were 5 people, what was the total cost of the dinner? (2023)
  1. $80
  2. $100
  3. $120
  4. $140

Questions & Step-by-Step Solutions

A group of friends went out for dinner. If the average cost per person was $20 and there were 5 people, what was the total cost of the dinner? (2023)
  • Step 1: Identify the average cost per person, which is $20.
  • Step 2: Identify the number of people in the group, which is 5.
  • Step 3: Use the formula for total cost: Total cost = Average cost per person × Number of people.
  • Step 4: Substitute the values into the formula: Total cost = 20 × 5.
  • Step 5: Calculate the total cost: 20 multiplied by 5 equals $100.
  • Average Cost Calculation – Understanding how to calculate total cost using average cost per person and the number of people.
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