Question
There were 33 pupils in a class. 18 of them got an A in a Mathematics test. 28 of them got an A in a History test. Every pupil got at least an A in the Mathematics test or History test. How many of them got an A in both the Mathematics and History tests?
4 m

Click button first when a symbol is required. X

There were 33 pupils in a class. 18 of them got an A in a Mathematics test. 28 of them got an A in a History test. Every pupil got at least an A in the Mathematics test or History test. How many of them got an A in both the Mathematics and History tests?