Precum touched my girls vagina. v didnt have sex. she is still a virgin. can she get pregnant?

Unlikely: It is unlikely that the sperm that came near to but didnt enter the vagina would cause pregnancy. However, it you are going to experiment this way, it is risky.

Long shot: There is potential for pregnancy if sperm is deposited at the introitus (opening of vagina) or within the vagina. If not ready for pregnancy – use protection every time.