SOLUTION: The number of weaving errors in a twenty foot by ten foot roll of carpet has a mean of 0.5. What is the probability of observing exactly 2 errors in the carpet?

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Question 995828: The number of weaving errors in a twenty foot by ten foot roll of carpet has a mean of 0.5. What is the probability of observing exactly 2 errors in the carpet?

Found 2 solutions by solver91311, MathTherapy:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


No possible way to tell. You provided the mean, but did not provide the standard deviation and did not indicate that the distribution was normal or not. Re-post with all of the pertinent information.

John

My calculator said it, I believe it, that settles it

Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!
The number of weaving errors in a twenty foot by ten foot roll of carpet has a mean of 0.5. What is the probability of observing exactly 2 errors in the carpet?
This is a POISSON Distribution. With number of observed errors being 2, we get: highlight_green%28system%28P%282%29+=+%22.125%22_OR%2C12.5percent%29%29