Answer:
The choice C.
[tex]11 \frac{1}{2} [/tex]
Step-by-step explanation:
[tex]15 \frac{5}{6} - 4 \frac{1}{3} \\ \\ \frac{95}{6} - \frac{13}{3} \\ \\ \frac{95}{6} - \frac{26}{6} = \frac{69}{6} \\ \\ \frac{69 \div 3}{6 \div 3} = \frac{23}{2} = 11 \frac{1}{2} [/tex]