- 40
- 46
- 48
- 41

Option 3 : 48

**Given:**

Average marks of 18 students = 45

Marks of 3 students were misread as 48, 31 and 95 instead of 98, 71 and 59

**Formula used:**

Total marks = Average × Number of students

**Calculation:**

Total marks = 18 × 45

⇒ 810

Correct total = 810 - (48 + 31 + 95) + (98 + 71 + 59)

⇒ 810 - 174 + 228

⇒ 864

Correct average = 864/18

⇒ 48

**∴**** The correct average is 48.**

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