Question 316280: Not to sure how to solve this one, any ideas?
A keyword search program lists the files that contain a given keyword. If it runs through 200 files, and each file contains the keyword with probability 0.25, independently of other files, compute the probability that least 50 files will be listed.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A keyword search program lists the files that contain a given keyword. If it runs through 200 files, and each file contains the keyword with probability 0.25, independently of other files, compute the probability that least 50 files will be listed.
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Binomial Problem with n = 200, p = 0.25
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P(50<= x <= 200) = 1 - binomcdf(200,0.25,49)
= 0.5271
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Cheers,
Stan H.
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