This year's “Dream of a Lifetime" Lottery sold 50 000 tickets and gave away 5000 prizes, including one grand prize.
a) What is the probability that one ticket will win the grand prize?
b) What is the probability that one ticket will win any of the prizes? Express your answer as a fraction.
Isn't it just 1/50,000 for the first one and 1/10 for the second one? IDK