math
posted by Anonymous .
Your medical terminology instructor listed the following grades for the class out of a 75 – point test: 33, 34, 43, 45, 45, 54, 55, 59, 60, 62, 64, 66, 67, 68, 67, 68, 68, 69, 70, 70.
find the 90th percentile

There are 20 grades, so the top 2 scores form the 90th %ile.