Question

The mean of 100 observation was found to be 40. later on, it was discovered that a number 27 was misread as 57 . find the correct mean​

Answer 1

Answer:

40.3

Step-by-step explanation:

Incorrect mean = 40

Sum of all observations = 40*100 = 4000

Now 27 was misread = 4000-27 = 3973

Corrected sum of all observation = 3973+57 = 4030

Corrected mean = 4030/100 = 40.3