There are 2100 story books in our local library. If 30% more story books are bought, what will be the total number of story books in the library now and also find out the additional numbers of story bought.

The ratio of my text books and story books is 4 : 3. If number of text books is 28, let's find the number of story books and total numbers of books.

Today morning I arranged the books in the almirah of my room. In each shelf I arranged books equal to the number of shelves of almirah. But 5 books remained out of the almirah. If toral number of book are 86, Let's find the number of shelves of the almirah.

The ratio of story books and text books of preetam is 2:5 . If preetam has 4 story books, then find how many text books he has.

There are 20 books on Algebra and Calculus in one library. For the greatest number of selections each of which consists of 5 books on each topic. If the possible number of Algebra books are N, then the value N/2 is __________.

A student is allowed to select at most n books from a collection of (2n + 1) books. If the total number of ways in which he can select at least one book is 63, find the value of n.

In a survey of college students it was found that 40% use their own books, 50% use library books, 30% use borrowed books, 20% use both their own books and library books. 15% use their own books and borrowed books, 10% use library books and borrowed books, and 4% use their own books, library books and borrowed books. Calculate the percentage of students who do not use a book at all.

Each x students of class V is given y books. But each x students of class VI is given (y+3) books. Again each (x+11) students of class VII is given (y+10) books. Calculate to find, how many books were given to the students of class V, VI and VII. Also find the total number of books given out in their classes.

Mili bought few exercise books for ₨. 80.50. Her brother bought few more for ₨. 57.50. Lets find the maximum price of an exercise book and total number of exercise books bought.

Mohini loves to read story books. She finishes 1/3 part of the book in an hour. Let us find, what part of book she read in 5/6 of an hour.

A library has a copies of one book, b copies each of two books, c copies each of three books, a single copy of d books. The total number of ways in which these books can be arranged in a shelf is equal to a. ((a+2b+3c+d)!)/(a !(b !)^2(c !)^3) b. ((a+2b+3c+d)!)/(a !(2b !)^2(c !)^3) c. ((a+b+3c+d)!)/((c !)^3) d. ((a+2b+3c+d)!)/(a !(2b !) (c !)^3)