The probability distribution of y, the number of accidents per 10 days of a diversion road in continuous days, is given by 1 3 4 f(y) 0.40 0.30 0.15 0.05 0.10 a. What is the probability of 15x<3 ? b. Graph the probability mass function. c. Graph the cumulative distribution function. d. Find the mean, variance, and standard deviation of the random variable x.

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