Suppose you wanted to find out what percentage of upper class Western High students own cars? You decided to do a stratified sample based on the junior and senior population at school. There are 800 seniors and 1,200 junior at Western for a total of 2000 students. How many juniors and seniors would you survey if you were to take a sample of 100 students. Hint - This requires a little math - First figure out the percentages of each subgroup to the total number of upper class students.