Five persons, A,B,C,D, and E, are going to speak at a meeting. a.) In how many orders can they take their turns speaking if B must speak (sometime) after A? b.) In how many orders can they take their turns speaking if B must speak immediately after A?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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Five persons, A,B,C,D, and E, are going to speak at a meeting.
a.) In how many orders can they take their turns speaking if B must speak (sometime) after A?
b.) In how many orders can they take their turns speaking if B must speak immediately after A?
Transcribed Image Text:Five persons, A,B,C,D, and E, are going to speak at a meeting. a.) In how many orders can they take their turns speaking if B must speak (sometime) after A? b.) In how many orders can they take their turns speaking if B must speak immediately after A?
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