6. A school has 2 types of student id names. An id of the first type has length 5, and the format is 2 lowercase letters followed by 3 decimal digits. An id of the second type has length 7, and the format is 3 lowercase letters followed by 4 decimal digits. How many possible students id names are there? 7. A website request that you create a password for your account. The password should be of length 4-8, and every character should be a decimal digit. How many possible passwords are there?

6. A school has 2 types of student id names. An id of the first type has length 5, and the format is 2 lowercase letters followed by 3 decimal digits. An id of the second type has length 7, and the format is 3 lowercase letters followed by 4 decimal digits. How many possible students id names are there? 7. A website request that you create a password for your account. The password should be of length 4-8, and every character should be a decimal digit. How many possible passwords are there?

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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