Answer:
Explanation:
Half of the 80 people are women, so divide 80 by 2.

One quarter of that is men.

The rest are children, so:

There are 30 children, 40 women, and 10 men.
The number of children to men is n:1.
There are 30 children to 10 men, and after simplifying that by dividing by 10, so the value of n is 3, and the ratio is 3:1.