Anwesha's marks in a class text of Sanskrit were incorrectly entered as 99 instead of 66. If there are 55 students in the class, then what is the increment in the average marks of the class in Sanskrit because of this typing error?

The correct answer is 0.6.

Step 1: Find the error in the total marks of the class.

Anwesha's marks were incorrectly entered as 99 instead of 66.

The increase in the total sum of marks due to the typing error is calculated as:

$\text{Increase in total marks}=99-66=33$

Step 2: Calculate the increment in the average marks of the class.

The formula for the average change is:

$\text{Increment in average}=\frac{\text{Increase in total marks}}{\text{Total number of students}}$

Given that the total number of students in the class is 55, substitute the values into the formula:

$\text{Increment in average}=\frac{33}{55}$

Simplifying the fraction by dividing the numerator and denominator by 11:

$\text{Increment in average}=\frac{3}{5}=0.6$

Therefore, the increment in the average marks of the class in Sanskrit is 0.6.