Answer:
480
Step-by-step explanation:
In order to predict the total number of people, we must make a proportion.
If out of 75 people 60 say yes, then out of 600 people how many would say yes.
Therefore, we have to:
(60/75) * 600 = 480
In other words, 480 people would say yes, keeping the proportion of the random sample that was made before
