Question

mean first five multiples of 6

Answer 1

First five multiples of six:

6x1=6
6x2=12
6x3=18
6x4=24
6x5=30
Mean= sum of observations / total no. Of observations
=6+12+18+24+30/5
=90/5
=18

Answer 2

first five multiples of six are 
                                         6 , 12 , 18 , 24 , 30
mean = sum of observations  /  total no. of observations
          = 6+12+18+24+30 / 5 
          = 90/5
          = 18