Ts Eamcet
Permutations And Combinations
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ+1 / -02020
A student is allowed to select at least $(n+1)$ books but not all books from a collection of ( $2 n+1$ ) books. If the total number of ways in which he can select these books is 255 , then the number of books in that collection is