Question

arithmetic mean of nine observations is calculated as 38 but in doing so, mistakenly the observation 27is taken instead of 72.find the actual mean​

Answer 1

Answer:

43

Step-by-step explanation:

Mean = sum of observations / number of observations

Here,

Mean = 38

Number of observations = 9

On this basis,

= > 38 = sum of observations / 9

= > 38*9 = sum of observations

= > 342 = sum of observations

"Sum of 9 observations = eight correct + 27"

= > 342 = sum of 8 correct + 27

= > 342 - 27 = 315 = sum of 8 observations

Correct is 72, so sum of correct 9 observations is 'sum of 8 observations + 72' = 315 + 72 = 387

Hence,

Correct mean = 387/9

Correct mean = 43

Answer 2

Answer:

Hi, what is your name?

Good morning I just wake up and sorry for late response