In a city in italy, 30% of the families have a mastercard 20% have AMEX, 25% Visa, 8% M/C & AMEX, 12% Visa/MC, 6% have AMEX & Visa ... 1. what is the probability of selecting a family that has either a visa card or an american card? 2. if a family has a M/C, what is the probability that it has a visa cardd? 3. If a family has a visa card, what is the probability Have to show work in excel.