Answer:
0.75
Step-by-step explanation:
Total number of people = 400
Number of people who say yes to gun laws being more stringent = 300
Number of people who say no to gun laws being more stringent = 100
The proportion of people who will say yes = Number of people who say yes to gun laws being more stringent / Total number of people
[tex]\text{The proportion of people who will say yes}=\frac{300}{400}\\\Rightarrow \text{The proportion of people who will say yes}=\frac{3}{4}=0.75[/tex]
∴ Proportion in the population who will respond "yes" is 0.75
