Question

in a school library for 4/15 are science books 3/10 are literature books and rest are mathematics books. if the number of mathematics books is 39, find the number of science books and literature books in the library
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Answer 1

Step-by-step explanation:

let the total no of books be x

let the no of science books be 4/15x

let the no of literature books be 3/10x

let the no of maths books be 39

now,

4/15x +3/10x +39=x

8x +9x+1170/30=x

17x+1170=30x

1170=30x-17x

1170=13x

1170/13 =x

90=x

therefore,total no of books is equal to 90

no of science books =4/15x

=4/15×90

=24

no of literature books =3/10x

=3/10×90

=27