The average of 10 observations is 46. It was realized later that an observation was misread as 42 in place of 142. The correct average is: - SSC STUDY

The average of 10 observations is 46. It was realized later that an observation was misread as 42 in place of 142. The correct average is:

Options:
a) 52
b) 46
c) 58
d) 56

Solution

As per question
Sum of all No. = 46 x 10 = 460
Correct sum = 460 + 142 – 42
= 560
Correct average = 560/10 = 56

Ans: d) 56