The average of 4 numbers is 30. If one number is 10, what is the average of the

Practice Questions

Q1
The average of 4 numbers is 30. If one number is 10, what is the average of the other three numbers?
  1. 28
  2. 30
  3. 32
  4. 34

Questions & Step-by-Step Solutions

The average of 4 numbers is 30. If one number is 10, what is the average of the other three numbers?
Correct Answer: 36
  • Step 1: Understand that the average of 4 numbers is 30.
  • Step 2: Calculate the total of the 4 numbers by multiplying the average by the number of numbers: 4 * 30 = 120.
  • Step 3: One of the numbers is given as 10.
  • Step 4: To find the total of the other three numbers, subtract the known number from the total: 120 - 10 = 110.
  • Step 5: Now, to find the average of the other three numbers, divide their total by 3: 110 / 3 = 36.67.
  • Step 6: Round 36.67 to the nearest whole number, which is approximately 36.
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