The vast majority of Visa and Discover Card credit cards have 16-digit card numbers. The first digit is either 4 (Visa) or 6 (Discover), digits 2 through 6 identify the issuer, digits 7 through 15 identify the customer, and the last digit is a "check digit" determined by the digits that precede it.† Your company, CreditXplosion, Inc., issues both Visa and Discover credit cards. How many different CreditXplosion Discover card numbers are possible in which the check digit is wrong?
The vast majority of Visa and Discover Card credit cards have 16-digit card numbers. The first digit is either 4 (Visa) or 6 (Discover), digits 2 through 6 identify the issuer, digits 7 through 15 identify the customer, and the last digit is a "check digit" determined by the digits that precede it.† Your company, CreditXplosion, Inc., issues both Visa and Discover credit cards. How many different CreditXplosion Discover card numbers are possible in which the check digit is wrong?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section: Chapter Questions
Problem 22T
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The vast majority of Visa and Discover Card credit cards have 16-digit card numbers. The first digit is either 4 (Visa) or 6 (Discover), digits 2 through 6 identify the issuer, digits 7 through 15 identify the customer, and the last digit is a "check digit" determined by the digits that precede it.† Your company, CreditXplosion, Inc., issues both Visa and Discover credit cards.
How many different CreditXplosion Discover card numbers are possible in which the check digit is wrong?
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