1003034402

SubArea: 
Logic and sets
Level: 
C
Project ID: 
1003034402
Accepted: 
1
Clonable: 
0
Easy: 
0
In a class of 31 pupils, 18 pupils learn Italian, 16 pupils learn Spanish and 12 pupils learn Portuguese. Now, 7 pupils learn Italian and Spanish, 9 pupils learn Italian and Portuguese and 5 pupils learn Spanish and Portuguese. Finally, 3 students do not learn any of these three languages. How many pupils learn all these languages?
3
5
2
1