Question
The ratio of the number of English books to Hindi books
in a library shelf is 5:4. If 140 Hindi books are written by Pradeep, which constitutes 20% of the Hindi books, then find the difference between the number of English books and Hindi books in the shelf.Solution
Number of Hindi books = 140/0.2 = 700 Number of English books = 700 × (5/4) = 875 Required difference = 875 – 700 = 175
Mirror formula is
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