Answer:
Choice D is correct answer.
Explanation:
We have to find number of ways to choose students to go to library.
From question statement , we observe that
Numbers of students = n= 10
Number of selected students = r = 3
Order doesn't matter.
Hence,we use the formula of combination to solve this question.

putting the values of n and r in abobe formula ,we get


= 120 ways
Hence, there are 120 ways to choose the students to go to library.