4. The average of marks in Math-ematics for 5 students was foundto be

1.	4. The average of marks in Math-ematics for 5 students was foundto be 50. Later, it was discoveredthat in the case of one studentthe marks 48 were misread as84. The correct average is:
Answer» Average of marks = sum of marks/ no. of students Then,50 = sum of marks/5sum of marks = 250 Difference between actual marks and misread marks= 48 - 84= - 36 Then,Sum of marks = 250 - 36 = 214 Correct average = 214/5 = 42.8

4. The average of marks in Math-ematics for 5 students was foundto be 50. Later, it was discoveredthat in the case of one studentthe marks 48 were misread as84. The correct average is:

Answer»

Average of marks = sum of marks/ no. of students

Then,50 = sum of marks/5sum of marks = 250

Difference between actual marks and misread marks= 48 - 84= - 36

Then,Sum of marks = 250 - 36 = 214

Correct average = 214/5 = 42.8