the average marks in science subject of a class of 20 students is 68. if the marks of two students were misread as 48 and 65 instead of the actual marks 72 and 61 respectively, what would be the correct average?

To calculate the average marks in the science subject for a class of 20 students, you need the total sum of marks obtained by all students in that subject. The formula for average marks is:

Average marks=Total marks obtained by all studentsNumber of students\text{Average marks}=\frac{\text{Total marks obtained by all students}}{\text{Number of students}}Average marks=Number of studentsTotal marks obtained by all students​

Example:

If the total marks obtained by all 20 students in science is 1400, then

Average marks=140020=70\text{Average marks}=\frac{1400}{20}=70Average marks=201400​=70

So, the average marks in science would be 70. If you provide the total marks or individual marks, I can help calculate the exact average for you!