Question

7. The mean of nine observations was found to be 35. Later on, it was discovered that an
observation 81 was misread as 18 ​Find the correct mean of the observations.
​

Answer 1

Answer:

42

Step-by-step explanation:

Incorrect mean of nine observations = 35

Incorrect sum of observations = 35× 9 = 315

Since, 81 is misread as 18.

So, correct sum of observations

= 315-18+81= 378

that is correct mean = 378/9 = 42