statistics

A national park is famous for its beautiful desert landscape and its many natural rock formations. The following table is based on information gathered by a park ranger of all rock formations of at least 3 feet. The height of the rock formation is rounded to the nearest foot.
Height of rock formation, feet 3–9 10–29 30–49 50–74 75 and higher
Number of rock formations in park 117 89 32 38 15
For a rock formation chosen at random from this park, use the preceding information to estimate the probability that the height of the rock formation is as follows. (Round your answers to two decimal places.)
(a) 3 to 9 feet

(b) 30 feet

(c) 3to 49 feet

(d) 10 to 74 feet

(e) 75 feet or taller

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  2. A national park is famous for its beautiful desert landscape and its many natural rock formations. The following table is based on information gathered by a park ranger of all rock formations of at least 3 feet. The height of the rock formation is rounded to the nearest foot.

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