Question

find the average of first six multiples of 3

Answer 1

the first three multiples of 3 are :
3,6,9,12,15,18
average= sum of quantities /no. of quantities
here,
sum of quantities = 3+6+9+12+15+18=63
and, no.of quantities=6
∴ average=63/6=10.5

Answer 2

First six multiples of 3 are 3,6,9,12,15,18

Average of first six multiples of 3 = sum of 6 multiples of 3/number of multiples.

= 3+6+9+12+15+18/6
= 63/6
= 10.5

Average of first six multiples of 3 is 10.5