Question

Arithmetic mean of nine observations is calculated as 38. But in doing so, mistakenly
the observation 27 is taken instead of 72. Find the actual mean of the data.​

Answer 1

Answer:

137/3

Step-by-step explanation:

mean=sum of observation/total number of observation

mean=38+27+72/3=137/3

Answer 2

Answer:

43.

Step-by-step explanation:

Mean = Sum of observations / total number of observations

Mean = Sum of observations / 9

Mean = 38 × 9

= 342.

lf a number is mistakenly written as 72 then 45 should be added to the sum.

Sum = 342

Actual sum should be :

342 + 45

= 387.

Mean = sum of observations / total number of observations

Mean = 387 / 9

Mean = 43.

hope the answer helps you.