O find the standard deviation of y. ® find p (y 7 5i1 minutes. 5.1
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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Transcribed Image Text:A bank teller Sehves Cus tomers standing
In the que le che by one. suppose that the Servi ce
time X for Castomer I has mean Mi=4
(minutes) and standard deviation oh= 2.9. We
tha t service times for different
CASSUME
bank
Customers areindefendent -let ☺ Be the average
time
the bank teller spends Serving 30 customers.
O find the
standard deviation of y.
® find p Cy 5.1 minutes.
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