Ann has collected 20 beautiful blue marbles pebbles on her last summer vacation. Her mother gave her permission to take only 4 pebbles for her friends. Each of the marble is coded with numbers as 1,2,...20. As 2 is her favorite number, she wants to select pebbles

Ann has collected 20 beautiful blue marbles pebbles on her last summer vacation. Her mother gave her permission to take only 4 pebbles for her friends. Each of the marble is coded with numbers as 1,2,...20. As 2 is her favorite number, she wants to select pebbles

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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