COMPETENCE TEST (COMBINATION)

1. For a quiz contest, 3 out of candidates, which are  Tika, Tiko, Toki, Tike and Teki, are chosen. How many
    formations can be chosen from the 5 candidates?


2. A bag consists of 7 black marbles and 5 white marbles. Four marbles are taken randomly at the same time.
    How many ways of taking the marbles are there if the marbles taken are,
    a. of free colors
    b. one of the four marbles is black
    c. two black marbles and one white marbles

3. Determine the value of the following combinations
    a. C(9 , 3) x C(7 , 2)
    b. C(8 , 3) : C(5 , 2)