A group of students conducted a survey. They randomly chose students of all grade levels and asked them whether they own at least one pair of white sneakers or not. They asked the same question to a total of
30 students. They found that 6 students among those 30 students own at least a pair of white sneakers. If there are a total of 48 students who own at least a pair of white sneakers, how many students are there in the school?
