Respuesta :
Answer:
1 hen
Step-by-step explanation:
For this problem, we will simply make the assumption that 1 hen can lay 1 egg every 3 days. Using this, let's build a proportion:
1 hen / 1 egg / 3 days == x hens / 3 eggs / 9 days
Notice our rate ( 1 egg / 3 days ) remains constant. This we can conclude based on our assumption that there is only 1 hen laying eggs.
If our rate was different, then we would have additional hens proportional to the rate.
Cheers.