In a certain city, 30% of the families have a MasterCard, 20% have an American Express card, and 25% have a Visa card. Eight per
cent 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
