John flies frequently and likes to upgrade his seat to first class. he has determined that if he checks in for his flight at least 2 hour early, the probability that he will upgrade is 0.8; otherwise, the probability that he will upgrade is 0.3. with his busy schedule, he checks in at least 2 hours before his flight only 40% of the time. at one randomly selected trip that john upgraded his seat to first class, what is the probability that he checked in at least 2 hour before the flight?