A dealership recently sold a four-door sedan it purchased for $19,000 at 15% markup. It accepted a
trade-in for it, and it paid $5000 for the trade. The next
day, it marked it up 25% and sold it in a week. What was
the dealership's profit on these two vehicles?

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Math it's appreciated. (picture provided)