In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Pets also track in pollen, and _ out of every ten people is allergic to cat or dog dander.
[EX A]: one

[EX Q]: Intramural football consists of _ leagues.
[EX A]: three

[EX Q]: Some dentists prefer using the oral rinse for three to _ days at a time.
[EX A]:
five