High in the Rocky Mountains, a biology research team has draineda lake to get rid of all fish. After the lake was refilled, theystocked it with an endangered species of Greenback trout. Of the2000 Greenback trout put into the lake 800 were tagged for laterstudy. An electroshock method is used on individual fish to get astudy sample. However, this method is hard on the fish. Theresearch team wants to know the smallest number of fish that mustbe electroshocked to be at least 80% sure of getting a sample oftwo or more tagged trout. Please provide the answer. For morestudies similar to this one, see A National Symposium on Catchand Release Fishing, Humboldt State University.
