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25% বৃদ্ধির পর একটি মান 500 হয়। মূল মানটি কত ছিল?

A375
B400
C425
D475
Answer & Solution
Correct answer: B. 400
চূড়ান্ত মান 500 হলো মূল মানের 125%, সুতরাং মূল মানটি ছিল 400।
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