In a recent issue of National Geographic Traveler (Vol. 22, No. 1, pp. 53, 100-105), P. Martin gave a list of five unique National Parks that he recommends visiting. They are Crater Lake in Oregon (C), Wolf Trap in Virginia (W), Hot Springs in Arkansas (H), Cuyahoga Valley in Ohio (V), and American Samoa in the Samoan Islands of the South Pacific (A).
a. Suppose you want to sample three of these national parks to visit. List the 10 possible samples (without replacement) of size 3 that can be selected from the five. For brevity, use the parenthetical abbreviations provided.
b. If a simple random sampling procedure is used to obtain three parks, what are the chances of selecting C, H, and A? V, H, and W?