PROBLEM 04: A code is formed by selecting four letters from the set L= {A, B, C, D, }, without replacement. For example, CDAB and DABC are two possible codes, but CAEĆ is not a possible code. How many such codes will contain the letter “D" ?

PROBLEM 04: A code is formed by selecting four letters from the set L= {A, B, C, D, }, without replacement. For example, CDAB and DABC are two possible codes, but CAEĆ is not a possible code. How many such codes will contain the letter “D" ?

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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Concept explainers

Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.

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PROBLEM 04: A code is formed by selecting four letters from the set L ={A, B, C, D, Ê }, without
replacement. For example, CDAB and DABC are two possible codes, but CAEC is not a possible code.
How many such codes will contain the letter "D" ?

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