9 The lifetimes of a certain brand of refrigerator are approximately normally distributed, with mean 2000 days and standard deviation 250 days. Mrs Chudasama and Mr Poole each buy one on the same date. What is the probability that Mr Poole's refrigerator is still working one year after Mrs Chudasama's refrigerator has broken down?
9 The lifetimes of a certain brand of refrigerator are approximately normally distributed, with mean 2000 days and standard deviation 250 days. Mrs Chudasama and Mr Poole each buy one on the same date. What is the probability that Mr Poole's refrigerator is still working one year after Mrs Chudasama's refrigerator has broken down?
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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