Multiple choice

Average marks in math subject of a class of 22 students are 72. If the marks of three were misread as 44, 53 and 56 of the actual marks 49, 51, and 60 respectively, then what would be the correct average?

  1. 56.98

  2. 34.98

  3. 72.31

  4. 34.23

  5. 11,34
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Original sum = 22 * 72 = 1584. Error = (49+51+60) - (44+53+56) = 160 - 153 = 7. Correct sum = 1584 + 7 = 1591. Correct average = 1591 / 22 = 72.318.

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