Answer: d) 13/15
Step-by-step explanation:
Complement of red marbles means NOT red marbles.
The marbles that are not red: 8 green, 5 white
[tex]\dfrac{\text{Quantity that are NOT red}}{Total\ marbles}\quad =\dfrac{8+5}{15}\quad =\large\boxed{\dfrac{13}{15}}[/tex]