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 ?
Answer & explanation
Correct answer: option 2
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