In a library, $20\%$ of the books are in Hindi, $50\%$ of the remaining are in English, and $30\%$ of the remaining are in French. The rest $6300$ books are in regional languages. Find the total number of books in the library.

Options:

• A: $22500$
• B: $25000$
• C: $20000$
• D: $24000$

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