In an examination, a student has to answer 4 questions out of 6. Questions 1 and 2 are however compulsory. The number of ways in which the students can make the choice is :
(a) C (6, 2)
(b) 6
(c) C (6, 4)
(d) 4
Correct option (b) 6
Explanation:
Since question 1 and 2 are compulsory, 4 questions are left from 6 and 2 are to be chosen from them.
∴ Required number of ways
