Question

A shopkeeper found that, out of his first 20 customers, 13 bought milk and 15 bought a newspaper. Four customers bought neither milk nor a paper. Represent this information in a venn diagram.. I have answers but they don't seem right.. need help. Exam tomorrow. PLEASSSEEEE

Answer 1

step 1 : find the customers that bought milk or newspaper, this is called a "Union" of sets and has the special symbol ∪ (milk ∪ newspaper)
step 2 : find the customers that bought milk and newspaper, this is called a "intersctions" of sets and has the special symbol ∩ (milk ∩ newspaper)
step 3 : find the customers that bought "milk only" and "newspaper only"
step 4 : draw the venn diagram