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

A. 40.2

B. 40.8

C. 42.8

D. 48.2

Answer: Option C

Solution(By Examveda Team)

According to the question,
Correct average
$$\eqalign{ & = \frac{{5 \times 50 + 48 - 84}}{5} \cr & = \frac{{250 - 36}}{5} \cr & = \frac{{214}}{5} \cr} $$
= 42.8