Question

The average marks of $100$ students were found to be $40$. Later it was discovered that a score of $53$ was misread as $83$. Find the correct average corresponding to the correct score _______.

• A. $38.7$
• B. $39$
• C. $39.7$
• D. $41$

Answer 1

The correct option is C $39.7$

Total of correct marks =100×40−83+53=3970=100×40−83+53=3970
∴∴ correct average =3970100=39.70