Question

The mean of 5 observation is 12 if mean of first 3 observation is 10. find mean of other 2

Answer 1

Step-by-step explanation:

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