Question

the mean of five numbers is 27 . If one number is excluded, their mean is 25 . Find the excluded observation.​

Answer 1

Answer:

35

Step by step explanation:

No. of observations (N) = 5

Mean(X) = 27

Sum(S)

= x × n

= 27 × 5

= 135

Now,

No. of observations (n) = 5-1 = 4

Mean(x) = 25

Sum(s)

= x × n

= 25 × 4

= 100

Therefore, the excluded= S - s = 135 - 100 = 35

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