In order to find the probability that someone chosen at random has some college education, we need to divide the total number of people that have some college education by the total number of people.
So we have:
[tex]P(\text{some)}=\frac{N(\text{some)}}{N(\text{total)}}=\frac{438}{1200}=\frac{219}{600}=\frac{73}{200}[/tex]
Therefore the probability is 73/200 and the correct option is b.
