Among the 30 students registered for a course in discrete

Last updated: 7/9/2022

Among the 30 students registered for a course in discrete mathematics, 15 people know the JAVA programming language, 12 know HTML, and 5 know both of these languages. (a) How many students know at least one of JAVA or HTML? (b) How many students know only JAVA? (c) How many know only HTML? (d) How many know exactly one of the languages JAVA and HTML? (e) How many students know neither JAVA nor HTML?