Step-by-step explanation:
Given that the mean of the numbers is 12
[tex]mean = \frac{sum \: \: of \: observations}{total \: number \: of \: observations} [/tex]
so here
let's that one as x and another one as 2x since it is given that one is twice the other
Therefore we get
[tex]mean = \frac{13 + x + 4 + 16 + 6 + 2x}{6} [/tex]
Given mean = 12
[tex]12 = \frac{39 + 3x}{6} [/tex]
[tex]72 = 39 + 3x[/tex]
[tex]3x = 33[/tex]
[tex]x = 11[/tex]
Hence it's 11 and 22