80% of an airline's flights depart on-time and 20% do not. Of those that depart on-time, 95% arrive on-time. OF those that depart late, 10% arrive on-time. What is the chance of someone taking a flight that will arrive on-time?

Answer 1

arriving on time:
Pr= (.8*.95+.2*.1)=
calculate that, less than 80 percent

Answer 2

0.78