If a senior class has 636 students that are expecting to graduate There are 618 students passing all the required courses as the beginning of May.

1.If a senior class has 636 students that are expecting to graduate There are 618 students passing all the required courses as the beginning of May. What is the probability of students graduating and not graduating?

2.If you are at a blackjack table with eight people, what would be the probability that someone draws a black jack? Note* most blackjack tables work with 8 full decks of cards, minus the jokers as there is two per deck