Answer: Option 'c' is correct.
Explanation:
Since we have given that
Number of students who are interested in being on the team = 9
Number of positions to fill on his basket ball team = 3
So, the combinations of the three positions he can choose for the team is given by
![3* 9=27](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qczw6zm70em7xw9tbcmkehbmot0doth6yt.png)
Hence, Option 'c' is correct.