The average marks of 20 students was found to be 60 . If the marks of two students were incorrectly entered as 28 and 44 instead of 73 and 35 respectively, then what is the correct average ?

61.8

Average of 20 students = 60

Wrong data = 28 +44 = 72

Correct data = 73 + 35 = 108

Difference = 108 - 72 = 36

Correct average = 60+ \(\frac{36}{20}\) = 60 + 1.8 = 61.8