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There are 'e' students in a school studying English and 'a' students studying Arabic. How many students study English and Arabic or both, if 'b' students study both?

Created: 6 years ago | Updated: 8 months ago

যদি দুইটি সন্নিহিত কোণের সমষ্টি ১৮০° হয়, তাহলে কোণ দুইটিকে পরস্পরের  সম্পূরক কোণ বলে

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