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একটি সংখ্যা 250 থেকে কমে 200 হয়। হ্রাসের শতকরা হার নির্ণয় করুন।

A15%
B20%
C25%
D50%
Answer & Solution
Correct answer: B. 20%
50 হ্রাস হলো মূল 250-এর এক-পঞ্চমাংশ (1/5), অর্থাৎ 20%।
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