a] H [2 + 2+ 2 = 6 marks] A committee of 9 persons is to be chosen from 3" lecturers and 112! students so as to contain at least 2 lecturers and 5 students. Find the number of ways a committee can he formed I. containing at least 2 lecturers and 5 students II. if5 particular students are always present in the committee III. when 5 particular students are never together