Multiple choice

The average marks of 30 students are 45 but after checking, there are two mistakes found. After adjustment, if a student got 15 less marks, then what will be the adjusted average

  1. 45

  2. 44

  3. 47

  4. 46

Reveal answer Fill a bubble to check yourself
B Correct answer
AI explanation

The total decrease in the overall marks is 15. Using the basic average formula, the change in the overall average is calculated by dividing the total marks decrease by the total number of students, giving 15 divided by 30, which equals a decrease of 0.5 marks. Subtracting this 0.5 decrease from the original average of 45 yields the new adjusted average of 44.