The two-way frequency table shows the results of a survey of a certain forest. Find the probability that a randomly chosen tree will be a California redwood tree taller than 300 ft. Round to the nearest thousandth.
Trees in Forest Height of 300 ft | California Redwoods | Giant Sequoia | Totals |
Over | 25 | 35 | 60 |
Under | 280 | 270 | 550 |
Totals | 305 | 305 | 610 |
A. 0.459
B. 0.082
C. 0.417
D. 0.041
Look at the intersection of the column "California Redwoods" and the row "Over"
Notice that the entry = 25
So....the probability that we have a California Redwood over 300 =
25 / [total trees in sample] = 25 / 610 = about 0.04098 = about 0 .041
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