Which expression represents the conditional probability that a randomly selected freshman has english as the first class of the day?

How do i do this? i don’t understand

How do you use the elimination method for this question? explain, because i really want to understand!

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.