In a certain city, 30% of the families have a mastercard, 20% have an american express card, and 25% have a visa card. eight percent of the families have both a mastercard and an american express card. twelve percent have both a visa card and a mastercard. six percent have both an american express card and a visa card. is possession of a visa card independent of possession of a mastercard? why or why not? no, because p (m | v) ≠ p (v) no, because p (v | m) ≠ p (v) yes, because p (m) = p(v) yes, because p (v ∩ m) ≠ 0 no, because visa and mastercard are different things