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A set of numbers has a mean of 20. If one number is removed, the mean becomes 18. What was the number removed? (2022)

Practice Questions

1 question
Q1
A set of numbers has a mean of 20. If one number is removed, the mean becomes 18. What was the number removed? (2022)
  1. 22
  2. 24
  3. 20
  4. 18

Questions & Step-by-step Solutions

1 item
Q
Q: A set of numbers has a mean of 20. If one number is removed, the mean becomes 18. What was the number removed? (2022)
Solution: Let the number of elements be n. Then, 20n - x = 18(n - 1). Solving gives x = 22.
Steps: 0

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