Question

A researcher randomly selects 3 fish from among 8 fish in a tank and puts each of the 3 selected fish into different containers. how many ways can this be done?

Answer 1

    First he can select one fish among 8, after that one among 7 of them and finally one among 6 fish.
    8 * 7 * 6 = 336
    Then he puts each of selected fish into different containers:
    336 * 3 * 2 * 1 = 2,016
    Answer: This can be done in 2,016 ways.