1. A manufacturer of mobile phone claims that 70% of its products pass a test of having no faults after 5 years. Twelve mobile phones are taken to see if this is the ease. Assuming that the treatment was successful. Find the probability that: A. Exactly 6 have no faults B. Fewer than 8 have no faults C. More than 4 but less than 8 have no faults

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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binomial and poisson distribution

1. A manufacturer of mobile phone claims that 70% of
its products pass a test of having no faults after 5
years. Twelve mobile phones are taken to see if this
is the ease. Assuming that the treatment was
successful. Find the probability that:
A. Exactly 6 have no faults
B. Fewer than 8 have no faults
C. More than 4 but less than 8 have no faults
Transcribed Image Text:1. A manufacturer of mobile phone claims that 70% of its products pass a test of having no faults after 5 years. Twelve mobile phones are taken to see if this is the ease. Assuming that the treatment was successful. Find the probability that: A. Exactly 6 have no faults B. Fewer than 8 have no faults C. More than 4 but less than 8 have no faults
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