((please answerr, will mark brainliest!))

Answer:
First one
Step-by-step explanation:
Let Baseball be event A
Basketball be event B
AUB = A + B - A^B
30 = 18 + 17 - A^B
A^B = 35 - 30
A^B = 5
No. of people who play both is 5.
Intersection should be 5