# Find out the correct average

The average marks of 30 students in a class is 45. While checking two errors were noticed. After correction, one student got 45 marks more and other 15marks less.What isthe corrected average?

- 47
- 48
- 46
- 50

**Answer: (3) 46 **

**Explanation:-**

The average marks of 30 students in a class = 45

Then, total marks of 30 students = 45 x 30

= 1350

After correction, one student got 45 marks more and other 15 marks less.

Then, total marks = 30 x 45 + 45 – 15

= 1350 + 30

= 1380

So, the average marks of 30 students = 1380/30

= 46

Hence, the correct answer is option (3) 46.