Respuesta :
Well sine you know that 9 students already read something 14-12=2 so only 2 students read both.
Subtract
14 - 4 = 10
10 - 5 = 5
5 - 3 = 2
2 students read both science fiction and fantasy books
14 - 4 = 10
10 - 5 = 5
5 - 3 = 2
2 students read both science fiction and fantasy books