Concept explainers
(a)
To calculate: The number of CreditXplosion cards where the card has 16 digit card number, the first digit is either 4 in Visa or 6 in Discover, digits 2 through 6 identify the user, digits 7 through 15 identify the customer and the last digit is a check digit, determined by digits that precede it.
(b)
To calculate: The number of CreditXplosion Discover card numbers in which the check digit is wrong where the card has 16 digit card number, the first digit is either 4 in Visa or 6 in Discover, digits 2 through 6 identify the user, digits 7 through 15 identify the customer and the last digit is a check digit, determined by digits that precede it.
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Chapter 7 Solutions
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