Answers

2016-01-02T17:49:54+05:30
The first three composite no.s are : 4,6,8

Mean = Sum / ( No. of elements ) = ( 4+6+8 ) / ( 3 ) = 6
1 5 1
2016-01-02T18:55:26+05:30
4,6,8
4+6+8 = 18.
18 / 3 (total numbers there)
= 6.
6 multiplied by 3 = 18.
1 5 1