Coast Guard maintains a database of the number, source, and location of oil spills in U.S. navigable and territorial waters. The following is a probability distribution for location of oil spill events. [SOURCE: Statistical Abstract of the United States]
Location Probability
Atlantic Ocean .......... 0.008
Pacific Ocean ............ 0.037
Gulf of Mexico ......... 0.233
Great Lakes ............ 0.020
Other lakes ............ 0.002
Rivers and canals ........ 0.366
Bays and sounds ........ . 0.146
Harbors ............ 0.161
Other .............. 0.027
Apply the special addition rule to find the percentage of oil spills in U.S. navigable and territorial waters that
a. Occur in an ocean.
b. Occur in a lake or harbor.
c. Do not occur in a lake, ocean, river, or canal.