WBCS.LIVE practice question

The arithmetic mean of the numbers 9, 12, 15, 18, 20, 22 is increased by 1, if 15 is replaced by

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 16
  2. 17
  3. 19
  4. 21

Correct answer and explanation

Correct answer: 21

Explanation: āœ… Correct Answer: D) 21 šŸ“š Explanation: There are 6 numbers in the set. For the mean to increase by 1, the total sum must increase by 6 x 1 = 6. Therefore, the number 15 must be replaced by 15 + 6 = 21