step by step explanation to this: University X requires some of its nursing students to take an exam before being admitted into the nursing program. In this year's class 1/2 the nursing students were required to take the exam and 3/5 of those who took the exam passed the exam. If this year's class has 200 students, how any students passed the exam? A. 120 B. 100 C. 60 D. 50