Question

mean of 100 observations is found to be 40 if at the time of computation two items are wrongly taken is 30 and 27 instead of 3 and 72 find the correct mean.

Answer 1

Answer:

At the time of computation, two items were wrongly taken as 30 and 27 instead of 3 and 72. So by using the formula of mean we will get the total sum of observations.

Answer 2

$\huge \bold{@QianNiu}$