Answer:The correct answer is option B.
Explanation:
Proportion the given solution:
[tex]\frac{3}{m}=\frac{12}{15}[/tex]
[tex]\frac{3}{12}=\frac{m}{15}[/tex]
[tex]m=\frac{3\times 15}{12}=3.75[/tex]
The value of the 'm' is 3.75.
The correct answer is option B.