Assume that the student has a cup with 9 writing implements: 5 pencils, 3 ball point pens, and 1 felt-tip pen. (1) In how many ways can the student select 2 writing implements?   (2) In how many ways can the selection be made if no more than one ball point pen is selected?

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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Assume that the student has a cup with 9 writing implements: 5 pencils, 3 ball point pens, and 1 felt-tip pen.

(1) In how many ways can the student select 2 writing implements?

 

(2) In how many ways can the selection be made if no more than one ball point pen is selected? 

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