a) How many 3 digits passcodes are there if first digit must be a 1 or 2 ? b) How many 3 digits passcodes are there if the only requirement is that repetition is not allowed?

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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1. List all subsets of { A, B, C, }


3. a) How many 3 digits passcodes are there if

first digit must be a 1 or 2 ?

b) How many 3 digits passcodes are there if the only
requirement is that repetition is not allowed?

4. Calculate P ( 7, 3 )    5. Calculate C ( 7, 3 ) 

6. How many ways are there to choose a panel consisting of 2 of 3 Republicans and 2 of 5 Democrats?

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