Answer: Her measuring cup has 8.25 mL of medicine.
Step-by-step explanation:
As per given,
In 11 mL of medicine, there are 20 drops.
That means quantity in 1 drop = [tex]\dfrac{11}{20}[/tex] mL
Now , the quantity in 15 drops = 15 x quantity in 1 drop
= [tex]15\times\dfrac{11}{20}[/tex]
[tex]=\dfrac{33}{4}[/tex]
= 8.25 mL
Hence, her measuring cup has 8.25 mL of medicine.