Question

The mean of 5 observations is 12. If the mean of the first 3 observations is 10, then find the mean of the other
two.

a. 10
b. 12
C. 12.5
d. 15​

Answer 1

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Sum of mean of 5 observation =5*12 =60

Sum of three observation =3*10=30

Sum of two observation= sum of 5 obs..-sum of 3 obs..=60-30=30

Then 30/2=15

Hence the mean of last 2 observation will be 15

Answer 2

Answer:

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