In a city in Italy, 30% of the families have a MasterCard, 20% have an American Express card, and 25% have a Visa card. Eight percent of 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.
What is the probability of selecting a family that has either a Visa card or an American Express card?
If a family has a MasterCard, what is the probability that it has a Visa card?
If a family has a Visa card, what is the probability it has a MasterCard?