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ind the unknown in each item. B. P(n,2)=_30_ C. P(n,3)=50 D. C(8,3)=___

ind the unknown in each item. B. P(n,2)=_30_ C. P(n,3)=50 D. C(8,3)=___

A First Course in Probability (10th Edition)
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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Find the unknown in each item.

B. P(n,2)=_30_

C. P(n,3)=50

D. C(8,3)=___

 

2. Angela was asked by her teacher how many ways she can choose a 5 item test to solve out of 10 given items. Joy decided to find out the answer using the computation below: n! P(n,r) = 10.9.8.7.6 = 30.240 10! = P(10,5) %3D (n-r)! (10-5)! Is Angela correct ? Justify your answer
Transcribed Image Text:2. Angela was asked by her teacher how many ways she can choose a 5 item test to solve out of 10 given items. Joy decided to find out the answer using the computation below: n! P(n,r) = 10.9.8.7.6 = 30.240 10! = P(10,5) %3D (n-r)! (10-5)! Is Angela correct ? Justify your answer
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