Answer:
The greatest amount of fizzy drink he can make is 420 ml
Step-by-step explanation:
we know that
The ratio of the parts of orange juice to parts of lemonade is
[tex]\frac{5}{2}[/tex]
so
using proportion
Find out the milliliters of lemonade needed to make fizzy drink with 300 ml of orange juice
Let
x -----> milliliters of lemonade needed
[tex]\frac{5}{2}=\frac{300}{x}\\\\x=300*2/5\\\\x=120\ ml[/tex]
Find the greatest amount of fizzy drink he can make
Adds the milliliters of lemonade plus the milliliters of orange juice
[tex]120+300=420\ ml[/tex]
therefore
The greatest amount of fizzy drink he can make is 420 ml