ratio = 2:6 = chocolate chip: sugar cookie
For 12 chocolate chip cookies:
2/6 =12/x
Where x is the number of sugar cookies :
Solve for x:
x = 12/(2/6)
x= 36
So, for 12 chocolate chip cookies, there are 36 sugar cookies.
Add both:
12+36 = 48 cookies on the platter