b) Consider two lists A and B, list A contains 30 students from mathematics class and list B
contains 35 students from Englis

By Lyla

b) Consider two lists A and B, list A contains 30 students from mathematics class and list B
contains 35 students from English class. Suppose there are 20 names on both lists. Find the
number of students: (i) only on list A, (ii) on list A or B (or both), (iii) on exactly one list.​

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