Question

The mean 01
15. The mean of a hundred observations was found to be 40. Later on, it was discovered that
score of 27 was misread as 57. Find the correct mean.
16
The mean of numbers is 32. If one number is excluded, then the mean gets reduced h​

Answer 1

hope it helps you

given ,mean is 40 and no.of observations is 100

so ,mean =sum of observations/no.of observations

so,40=sum of observations/100

4000= sum of observations

so given that 27 was misread as 57 so...4000-57+27=4000-30=3970

so the new mean/correct mean = 3970/100

=39.70