In how many ways can 5 balls can be chosen from 9 different balls?
None of these.
The number of ways 5 balls can be chosen is 9C5 = 126.
There are 5 historical monuments, 6 gardens and 7 shopping malls in the city. In how many a tourist can visit the city, if he visits at least one shopping mall?
In how many ways can a committee of 4 people can be chosen out of 9 people?
In how many ways atleast 5 students can be selected from 9 students.