the average Marks Secured by 36 Students was 52 . But It Was discovered That term 64 Was missed as 46 What is the mean of Marks is?
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Difference of correct and incorrect marks = 64 – 46 = 18
∴ Correct mean = 52 +1836
Correct mean = 52.5
Second method to solve this question with the help of given formula :
Here, n = 36, m = 52 , a = 64, b = 46
New mean = m +(a - b)n
New mean = 52 +(64 - 46)36
New mean = 52 +1836
New mean = 52 +1= 52.52
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