Multiple choice

Average scores of fifty students in a class is $ 44$. Later on it was found that a score $ 23 $ was incorrectly recorded as $ 73$. The correct average score is

  1. $42$
  2. $43$
  3. $45$
  4. $44$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total sum = 50 * 44 = 2200. Correct sum = 2200 - 73 + 23 = 2150. Correct average = 2150 / 50 = 43.

AI explanation

The total score of all fifty students is 50 times 44, which is 2200. The error was recording 73 instead of 23, so the total must be corrected by subtracting 50, giving a new total of 2150. The correct average score is 2150 divided by 50, which equals 43.

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