An advertising campaign is being developed to promote a new bookstore opening in the newest mall development.To develop an appropriate mailing list,it has been decided to purchase lists of credit card holders from MasterCard and Visa.Combining the lists,they find the following: 40% of the people on the list have only a MasterCard and 10% have only a Visa card.Another 20% hold both MasterCard and Visa.Finally,30% of those on the list have neither card.Suppose a person on the list is known to have a MasterCard.What is the probability that person also has a Visa Card?

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The Answer of An advertising campaign is being developed to promote a new bookstore opening in the newest mall development.To develop an appropriate mailing list,it has been decided to purchase lists of credit card holders from MasterCard and Visa.Combining the lists,they find the following: 40% of the people on the list have only a MasterCard and 10% have only a Visa card.Another 20% hold both MasterCard and Visa.Finally,30% of those on the list have neither card.Suppose a person on the list is known to have a MasterCard.What is the probability that person also has a Visa Card?

An Advertising Campaign Is Being Developed to Promote a New