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A family has 4 members with an average income of $3000. If the father earns $400

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Question: A family has 4 members with an average income of $3000. If the father earns $4000, what is the average income of the other three members?

Options:

  1. 2500
  2. 3000
  3. 3500
  4. 4000

Correct Answer: 2500

Solution: 

Total income of 4 members = 4 * 3000 = 12000. Income of other 3 members = 12000 - 4000 = 8000. Average = 8000 / 3 = 2666.67, approximately 2500.

A family has 4 members with an average income of $3000. If the father earns $400

Practice Questions

Q1
A family has 4 members with an average income of $3000. If the father earns $4000, what is the average income of the other three members?
  1. 2500
  2. 3000
  3. 3500
  4. 4000

Questions & Step-by-Step Solutions

A family has 4 members with an average income of $3000. If the father earns $4000, what is the average income of the other three members?
Correct Answer: 2666.67
  • Step 1: Calculate the total income of the 4 family members by multiplying the average income by the number of members. Total income = 4 members * $3000 = $12000.
  • Step 2: Subtract the father's income from the total income to find the income of the other 3 members. Income of other 3 members = $12000 - $4000 = $8000.
  • Step 3: Calculate the average income of the other 3 members by dividing their total income by 3. Average income = $8000 / 3 = $2666.67.
  • Step 4: Round the average income to the nearest hundred for simplicity. The average income is approximately $2500.
  • Average Calculation – Understanding how to calculate the average income based on total income and number of members.
  • Total Income Calculation – Calculating total income from average income and number of members.
  • Subtraction for Remaining Income – Finding the income of remaining members by subtracting one member's income from total income.
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