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The probability is 0.3 that a traffic fatality involves an intoxicated or alcohol-impaired driver or...

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The probability is 0.3 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In six traffic fatalities, find the probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant isa. exactly three; at least three; at most three.b. between two and four, inclusive.c. Find and interpret the mean of the random variable Y.d. Obtain the standard deviation of Y.

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