Respuesta :

It's D if you  need an explanation let me know
10 11/12 + 7 1/4 
= 10 11/12 + 7 1/4 
= 10 11/12 + 7 3/12
= 17 14/12
= 18 2/12
= 18 1/6
answer
D. 18 1/6