The teachers were all excited about going back to school this year. They
got together for a faculty meeting on the first day and they discovered:
17 of the teachers went on a trip during the summer;
13 of the teachers taught a class during the summer;
15 of the teachers spent some time at the beach.
Only 2 teachers didnít go to the beach, or go on a trip, or teach a
class all summer.
Some of the teachers did more than one of these activities.
In fact, 8 teachers went on a trip and were at the beach. Also, 4
teachers taught a class and went on a trip. And 1 teacher did all
How many teachers altogether were at the meeting that first day?