Answer:
A.
Step-by-step explanation:
[tex]\frac{n}{3}+12[/tex]
Let the number be n
First find the one third of the number.
One third of n
[tex]\frac{1}{3}*n\\=\frac{n}{3}[/tex]
Now we have to increase this number by 12, that is we will add 12 to this and get
[tex]\frac{n}{3}+12[/tex]
Hence the answer is [tex]\frac{n}{3}+12[/tex]
