In a school, there are four sections of 40 students each in XI standard. In how many ways can a set of 4 student representatives be chosen, one from each section?
Given: there are four sections of 40 students each in XI standard.
To find : number of ways in which a set of 4 student representatives be chosen, one from each section.
Ways of selecting one student from section 1:40C1
Ways of selecting one student from section 2:40C1
Ways of selecting one student from section 3:40C1
Ways of selecting one student from section 4:40C1
So number of ways of choosing a set of 4 student representatives one from each section=40C1 × 40C1 × 40C1 × 40C1
=40 × 40 × 40 × 40
=2560000