Answer:
the answer is 7 units
Step-by-step explanation:
18 line segments also for faster and better u can 6 times 3 since there is already three in a triangle.
Exactly one activity:
246None of the activities :
1At least one activity:
74Snowboarding and Ice skating but not skiing:
5Snowboarding or ice skating but not skiing:
132.
Only skiing :
119.
The diagram is in the attachment.
