In an examination, a student has to answer 4 questions out of 5 questions; questions 1 and 2 are however compulsory. Determine the number of ways in which the student can make the choice.

Solution:

It is known that,

As per the question,

5 = Total no. of questions

4 = No. of questions to be answered

Question number 1 and 2 are compulsory questions.

As a result, the no. of ways in which the student can make the choice ways.