Answer: Ryan will be able to fill 9 mugs.
Explanation:
Total quarts of hot chocolate made by Ron =
quarts.
It can be written as

Each mug holds
of a quart.
Then by division operation, the number of mugs Ryan will be able to fill :-
Total quarts of hot chocolate ÷ Quarts of hot chocolate hold by each mug.
=

Hence, Ryan will be able to fill 9 mugs.