SOLUTION: Janice wants to select 2 books to read from a list of 9 books. How many different pairs of books can she choose?
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Question 939365: Janice wants to select 2 books to read from a list of 9 books. How many different pairs of books can she choose? Answer by srinivas.g(540) (Show Source):
You can put this solution on YOUR website! 2 books can be selected from list of 9 books in c(9,2) ways
(9,2)=
=
=36
2 books can be selected from list of 9 books in 36 ways
