Please help me with the following practice questions. Clearly show and explain the answer so that I can better understand.

Suppose 37 students are enrolling in one of four courses. There will be at least one course that has at least how many students? If you draw two playing cards from separate decks of 52 cards, consisting of four suits, what is the probability that the two cards will be different suits? O 15/26 O 41/52 O 9/13 0 3/4 How many integers are there between 100 and 500 inclusive that are divisble by 4