Among 27 to 32 year old 25 say they have written an, Ask an Expert

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Among 27 to 32 year old 25% say they have written an editorial letter while under the influence of alcohol. Suppose six 27 to 32 year old are selected at random.

(A) What is the probability that at least one has not written an editorial letter while under the influence of alcohol?

(B) What is the probability that at least one has written an editorial letter while under the influence of alchol?

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