Arches national park is located in southern Utah. The park is famous for it beautiful desert landscape and its many natural sandstone arches. Park ranger Edward Mccarrick started an inventory (not complete) of natural arches with the park that have an opening of at least 3 feet. The following table is based on information taken from the book canyon country arches and bridges, by F.A. Barnes. The height of the arch opening is rounded to the nearest foot.
For an arch chosen at random in arches national park, use the preceding information in estimate the probability that the height of the arch opening is
(a) 3 to 9 ft.
(b) 30 ft. or taller
(c) 3 to 49 ft.
(d) 10 to 74 ft.
(e) 75 feet or taller
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