I don't think it really matters if there's a dash there or not
Answer:
None
Step-by-step explanation:
None of these, but
so if 64 is an option than that's the correct option

P(B|A) = P(B), based on your description, it does not indicate any relationship between A and B, so P(B) is irrelevant with P(A)
37.9 equals 30+7+.9 you should try to put in number form so you know what you're dealing with