Question

The mean of 10 observations is 25.6. Including one new observation,the mean of all the observations together is 26. Find the newly included observations

Answer 1

Answer:

30

Step-by-step explanation:

25.6=X/10

so x=256

26=x/11

so x=286

new observation is 286-256=30

Answer 2

The newly included observation is 30.

Step-by-step explanation:

Since we have given that

Number of observation = 10

Mean = 25.6

So, Sum of observations is given by

$25.6\times 10=256$

Including 1 observation, the mean is 26.

So, Sum of observations is given by

$26\times 11=286$

So, the value of newly included observations is given by

$286-256=30$

Hence, the newly included observation is 30.

# learn more:

The mean of 5 observations is 20 including one new observation the mean is 25 find the newly included observation

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