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  • In how many ways can you select 3 books from a shelf of 7 identical books?  Option: 1 7O

In how many ways can you select 3 books from a shelf of 7 identical books?

 

Option: 1

7


Option: 2

21


Option: 3

35


Option: 4

120


Answers (1)

best_answer

Since the books are identical, the order of selection doesn't matter. It can be solved using the combination formula. The number of ways to select 3 books from a set of 7 books is given by      
            C(7,3)=\frac{7 !}{(3 ! \times(7-3) !)}=21

Posted by

jitender.kumar

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