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The probability is

style="color:rgb(0,0,0);">0.35


0.35 that a traffic fatality involves an intoxicated or​ alcohol-impaired driver or nonoccupant. In eight


eight traffic​ fatalities, find the probability that the​number, Y, which involve an intoxicated or​ alcohol-impaired driver or nonoccupant is

a. exactly​ three; at least​ three; at most three.

b. between two


two and four


four​, inclusive.

c. Find and interpret the mean of the random variable Y.

d. Obtain the standard deviation of Y.


round to four decimal places as needed

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