At a Texas college, 60% of the students are from the southern part of the state, 30% are from the northern part of the state, and the remaining 10% are from out-of-state. All students must take and pass an Entry Level Math (ELM) test. We also know that if from south, 60% of students have passed the test. If from north, 70% have passed the test, and if from out-of-state, 90% of students have passed the test.