Q40. A boy has three library tickets and eight books of his interest in the library. Of these eight, he does not want to borrow Chemistry Part II unless Chemistry Part I is also borrowed. In how many ways can he choose the three books to be borrowed?
The world’s first book-less library has been set up in the state of Texas in the United States. Unlike the rows upon rows of books that are found in a conventional library anywhere in the world, at the book-less library, there are high– tech gadgets that have replaced the books as found in other libraries.The borrowers of books from this high-tech book-less library have a different set of rules to follow when borrowing books. Instead of taking home books for reading, the members of the library, who are registered residents of the south Texas country of Buxar, can now access their choice of reading material from e-readers. Also, instead of having to pay a fee for membership of the library and for borrowing books and other facilities, the members can borrow reading material from the book-less library for free. The services of this library have found favour with its readers is clearly visible from the growing readership numbers at this library. Since its start in September, the country’s 1.7 million residents have been able to check out and take home the machines for reading purposes and accessing the catalogue.
Q. The borrowers in a high-tech library have to follow