Books vs Ebooks comparison in Hindi #Shorts #Short

Short Circuiting

In a collection of "6" English books and "4" Hindi books,the probability that "3" particular English books will be together is:

In a school library, the ratio of mathematics books to Science books is the same as the ratio of Science books to Hindi books. If there are 450 books in Science and 300 books in Hindi, find the number of books in Mathematics.

In how many ways can 21 books on English and 19 books on Hindi be placed in a row on a shelf so that two books on Hindi may not be together? (A) 770 (B) 385 (C) 1540 (D) 399

In how many ways can 19 indentical books on English and 17 identical books on Hindi be placed in a row on a shelf so that two books on Hindi may not be together ?

How will be the following errors rectified? Sales Book is short casted by Rs. 5,000. (ii) Sales Return Book is short casted by Rs. 500. Balance of Sales Book is carried forward short by Rs. 1,000. (iv) Balance of Sales Return Book is carried forward short by Rs. 100.