A banking system requires Personal Identification Numbers (PINs) that satisfy the following constraints. (1) Must consist of only decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. (2) Must have length at least 5, and at most 8. (3) Must not be the customer's birth date. (Here, a birth date would be encoded as a 6 digit number, so for instance May 3, 1998 would be 050398) How many different valid PINS are there?
A banking system requires Personal Identification Numbers (PINs) that satisfy the following constraints. (1) Must consist of only decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. (2) Must have length at least 5, and at most 8. (3) Must not be the customer's birth date. (Here, a birth date would be encoded as a 6 digit number, so for instance May 3, 1998 would be 050398) How many different valid PINS are there?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A banking system requires Personal Identification
Numbers (PINs) that satisfy the following constraints.
(1) Must consist of only decimal digits (0, 1, 2, 3, 4, 5,
6, 7, 8, 9}. (2) Must have length at least 5, and at most
8. (3) Must not be the customer's birth date. (Here, a
birth date would be encoded as a 6 digit number, so
for instance May 3, 1998 would be 050398) How
many different valid PINS are there?
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