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A manufacturer produces a large number of microwaves. From past experience, the manufacturer knows that approximately 1.5% of all its microwaves are defective. Consumer Reports randomly selects 20 of these microwaves for testing. You want to determine the probability that no more than one of these microwaves is defective.
 one year ago
 one year ago
A manufacturer produces a large number of microwaves. From past experience, the manufacturer knows that approximately 1.5% of all its microwaves are defective. Consumer Reports randomly selects 20 of these microwaves for testing. You want to determine the probability that no more than one of these microwaves is defective.
 one year ago
 one year ago

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radhBest ResponseYou've already chosen the best response.0
What is the probability that at most two of the microwaves are defective?
 one year ago

wioBest ResponseYou've already chosen the best response.2
It's just binomial distribution, no?
 one year ago

radhBest ResponseYou've already chosen the best response.0
Yeah, but how would I get it with x<=2. I know how to do x=2, but not x<=2.
 one year ago

wioBest ResponseYou've already chosen the best response.2
\[ \Pr(X\leq 2) = \Pr(X=0, X=1, X=2) = \Pr(X =0) + \Pr(X = 1) +\Pr(X = 2) \]
 one year ago

radhBest ResponseYou've already chosen the best response.0
Ah, alright. Thanks. I get it now.
 one year ago

wioBest ResponseYou've already chosen the best response.2
They're mutually exclusive events. They can't have both exactly 2 and exactly 1 defective microwave.
 one year ago
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