Mean of Eight observation is 25 . If one observation is 11 excluded . find mean of the remaining .
no. of observations =8

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Solution

Mean of $8$ observations is $25$ .

$∴$ Total number of $8$ observations $= 25 \times 8 = 200$

If the observation $11$ is excluded, then the total of $7$ observations

$= 200 - 11 = 189$

$∴$ The mean of $7$ observations $= \frac{189}{7} = 27$

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Mean of Eight observation is 25 . If one observation is 11 excluded . find mean of the remaining .no. of observations =8

Mean of 8 observations is 25.∴ Total number of 8 observations =25×8=200If the observation 11 is excluded, then the total of 7 observations =200−11=189∴ The mean of 7 observations =1897=27

Mean of Eight observation is 25 . If one observation is 11 excluded . find mean of the remaining .
no. of observations =8

Mean of $8$ observations is $25$ .

$∴$ Total number of $8$ observations $= 25 \times 8 = 200$

If the observation $11$ is excluded, then the total of $7$ observations

$= 200 - 11 = 189$

$∴$ The mean of $7$ observations $= \frac{189}{7} = 27$