The ratio of the number of mystery books to the number of science fiction books is 4: 3. the ratio of the number of science fiction books to the number of biographies is 4: 5. if there are 48 science fiction books, find the total number of books.

Given is the number of science fiction books = 48

Let the number of mystery books be = x

Let the number of biographies be = y

Ratio of the number of mystery books to the number of science fiction books is 4:3 so

=

Ratio of the number of science fiction books to the number of biographies is 4:5 so

=

Hence there are 48 science fiction books, 64 mystery books and 60 biographies.

So total number of books are =

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

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