Question

the total number of books in a library is 9987 which includes textbooks and books on travel and biographies. if there are 1876 textbooks and 2798 books on travel and 875 biographies then how many books are there on fiction in the library

Answer 1

first we will add the no. of books of textbooks ,travel ,biographies. Then the no. of books will be 1876+2798+875 which is =5,549 .
number of books in library =9987
fiction books in library =9987- 5549

=9987
- 5587
______
4,438

Answer 2

Total books =9987
textbooks =1876
travel = 2798
biography =875
fiction = let x .
A/q,
1876+2798+875+x =9987
5549+x =9987
x=9987-5549
x=4438