Solved: Probability of telephone, If 20% of the residents in a U.S. city prefer a white telephone, Basic Statistics

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Probability of telephone

If 20% of the residents in a U.S. city prefer a white telephone over any other color available, what is the probability that among the next 1000 telephones installed in that city

(a) Between 170 and 185 inclusive will be white?

(b) At least 210 but not more than 225 will be white?

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Basic Statistics: Probability of telephone

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Basic Statistics: Probability of telephone

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