The probability is 0.4 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.

a. The probability that exactly three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is?

The probability that at least three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is?

The probability that at most three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is?

b. The probability that between two and four traffic fatalities, inclusive, involve an intoxicated or alcohol-impaired driver or nonoccupant is?

c. The mean of Y is

Choose the correct interpretation of the mean below.

A. In every six traffic fatalities, exactly this many will involve an intoxicated or alcohol-impaired driver or nonoccupant.

B. On average, of six traffic fatalities, this many will involve an intoxicated or alcohol-impaired driver or nonoccupant.

C. On average, of this many traffic fatalities, 1 will involve an intoxicated or alcohol-impaired driver or nonoccupant.

d. The standard deviation of Y is?