Answer: 0.25 computer
Explanation:
Given that,
Smith can produce = 4 computers or 16 smartphones
Ricardo can produce = 6 computers or 12 smartphones
The opportunity cost for smith to produce one smartphone is as follows:
= [tex]\frac{Total\ computers\ can\ be\ produced}{Total\ smartphones\ can\ be\ produced}[/tex]
= [tex]\frac{4}{16}[/tex]
= 0.25
Therefore, 0.25 computer have to be foregone to produce one smartphone.