The following table presents the total number of tornadoes (violent, rotating columns of air with wind speeds over 100 miles per hour) in the United States between 1980 and 1991.

Suppose that one of these years is randomly selected, and let X denote the number of tornadoes in that year. Find?

(a) P{X > 900}

(b) P{X ≤ 800}

(c) P{X = 852}

(d) P{700 < X < 850}

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