Two hundred fifty tickets for a draw were sold.
One ticket, drawn at random, wins the prize.
a) Joe purchased 1 ticket.
What is the probability Joe will win?
b) Maria purchased 10 tickets.
What is the probability Maria will win?
c) Ivan purchased 25 tickets.
What is the probability Ivan will not win?
Express each probability three ways.

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?