The names of 5 students are placed in a hat. In how many ways can three students be chosen so that the first student is captain, the second student is co-captain, and the third student is the group secretary?Explain and step by step.

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample