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genyjoannerubiera
18.12.2019 •
Mathematics
Consider a manufacturing process with a quality inspection station. in the past, 15% of parts are defective. as soon as one defective part is found, the process is stopped. if 8 parts have been inspected without finding a defective part, what is the probability that at least 11 total parts will be inspected before the process is stopped?
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Ответ:
0.614125
Step-by-step explanation:
Given that a manufacturing process with a quality inspection station has on an average 15% of parts are defective.
As soon as one defective part is found, the process is stopped.
We find that number of defectives would be binomial because each part randomly selected has a constant probability of 0.15 being defective
Probability that at least 11 total parts will be inspected before the process is stopped/8 parts have been inspected without finding a defective part
=![P(x\geq 11)/P(x=8)\\](/tpl/images/0423/8763/a4c2f.png)
= Probability of 9th, 10th, 11th should not be defective
=![(1-0.15)^3\\= 0.614125](/tpl/images/0423/8763/6dc9d.png)
Ответ:
x-6
Step-by-step explanation: