Question

. A tabular while calculating the average marks of 100 students of an examination, by mistake enters 68, instead of 86 and obtained the average as 58, the actual average marks of these student is:​

Answer 1

Answer:

Step-by-step explanation:

Number of students=100

Wrong average=58

Now total marks obtained by all the students of the class= 58*100=5800

This is in accordance to the data that has the mistake.

Now let's correct the mistake…

Substract the incorrect score from the total.

5800–68

=5732

Now this the correct total of all the other students. Now, to get the actual total of the class add the unfortunate student's score to the total of the rest of the class.

5732+86=5818

This is the correct total marks of the class. To find the average divide the total by the number of students in the class. Thus we get,

5818/100=58.18

And this my friend is the answer.