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5% বৃদ্ধির পর একটি পরিমাণ হয় ₹840। পূর্বে এটি কত ছিল?

A₹780
B₹800
C₹820
D₹840
Answer & Solution
Correct answer: B. ₹800
₹840 হলো প্রারম্ভিক পরিমাণের 105%, তাই শুরুতে এটি ছিল ₹800।
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