Multiple choice

The average of marks in Mathematics for 5 students was found to be 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :

  1. $40.2$
  2. $40.8$
  3. $42.8$
  4. $48.2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Incorrect total = 5 × 50 = 250. Correct total = 250 - 84 + 48 = 214. Correct average = 214/5 = 42.8.

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