6. A thief tries to open a door with a code: it has 12 press-buttons labeled 0, 1, 2, 3, 4, 5, 6, 7, 8,9, #, and expects six digits followed by either # or *. How many codes are possible:(i) with no further indication?(ii) if no number is repeated?By observing the buttons, one can try to guess the frequency of the use of each button. Indeed,thief notices that the buttons 4, 6, 7, 8, * are never used (not in the code), the button 1 appears atleast twice, and there is no guarantee for the other digits.(iii) How many codes are possible with this new hint?(iv) How many codes are possible if the thief realizes also that 1 appears strictly more times than9, which appears strictly more times than 2?

6i. 2,000,0006ii. 302,4006iii. 12,2816iv. 2,505Explanation:6i. The entire code has seven characters.…

Answered: 6. A thief tries to open a door with a…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Note:- give correct answer else downvoted sure.....
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