3.A banking system requires Personal Identification Numbers (PINS) that satisfy the followingconstraints.(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?

The PIN only uses decimal digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. There are 10 digits can be used. Now,…

Answered: A banking system requires Personal…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A computer program requires the user to enter a 6-digit registration code made up of digits 0,1, 5, 6, 7, and 9. Each number has to be used, and no number can be used more than once. How many different registration codes are possible?
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In 2019, the United States Department of Education defined a "credit hour" as one hour per week of instruction, and two additional hours of work outside of class. So, for example, a 3 credit hour class should aim to have about 6 hours of outside-of-class work per week.Earlier this semester, I asked students how many hours they spent on the course outside of class time. A couple students provided helpful, but non-numeric, responses, so I omitted them from the data set. Below is a dotplot and summary statistics from the other responses: a)suppose we want to view this data as a sample of students from sections of Math 104. Then: n= xˉ= s= b)List at least one concern you might have about using this sample to do inference on the number of study hours for all students taking Math 104. c)Putting aside the concerns you raised in (b) the Professor is wondering if the sample demonstrates that the amount of work he assigns in the course is reasonable under the federal guidelines for a…
A company’s security policy requires each employeeto have an ID number. The policy also requires eachperson’s ID number to be printed on their ID card.Under the policy, each ID number must contain sixdigits, and no digit can be used more than once in aparticular ID number. Assuming that the companyhas 152,000 employees, is this a sensible policy?
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As the customer base at OHaganBooks.com grows, IT manager Ruth Nabarro is thinking of introducing identity codes for all the customers, using capital letters and/or numbers. Help her answer the following question. It appears that Nabarro has finally settled on codes consisting of two letters followed by two digits. For technical reasons, the letters must be different, and the first digit cannot be a zero. How many different customers can be identified?
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