The school arranges a group of students to sort out books in the library. If the number of boys increases (1/5), the number will reach 52; if the number of girls decreases (1/5), the number will be 42. How many students were in this batch of students originally arranged?
学校安排一批学生到图书馆整理图书，如果男生增加(1/5)，人数将达到52人，如果女生减少(1/5)，人数是42人．原来安排的这批学生是多少人？
<result>50</result>