92. A recent survey asked students what pets
they have. Based on the results, the following
statements are all true:
23 students have dogs.
20 students have cats.
3 students have both dogs and cats.
5 students have no cats or dogs.
How many students were surveyed?
F. 40
G. 42
H. 45
J. 46
K. 51

Respuesta :

23 students have dogs and 20 students have cats. However 3 students have both animals. So, its really 20 students that only have dogs, 17 students that only have cats, 3 students who have both, and 5 people who have neither. 
20 + 17 + 3 + 5=45


the answer would be H I believe.