Question 251975: White flies are devastating California crops. An area infested with white flies is to be sprayed with a chemical which is known to be 98% effective for each application. Assume a sample of 1000 flies is checked.
Find the approximate probability that at least 975 of the
flies are killed in one application.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! White flies are devastating California crops. An area infested with white flies is to be sprayed with a chemical which is known to be 98% effective for each application. Assume a sample of 1000 flies is checked.
Find the approximate probability that at least 975 of the
flies are killed in one application.
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It's binomial with n=1000, p = 0.98, and x>= 975
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Using a TI calculator I get:
P(x>= 975) = 1 - binomcdf(1000,0.98,974) = 0.8901
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Cheers,
Stan H.
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