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70% of Amerians file their taxes electronically. For a group of 12 American adults who were selected at random, what is the probability that at least five of them file their taxes electronically?
14 years ago

Answers

Mgraph
P=P(5)+P(6)+P(7)+P(8)+P(9)+P(10)+P(11)+
P(12)

P(k)=12Ck(0.7)^k(0.3)^(12-k), k=5,6,...,12

You can also find the probability of the opposite event.
14 years ago

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