এটা সংখ্যাক প্ৰথমে 20% বৃদ্ধি কৰা হয় আৰু তাৰ পিছত 20% হ্ৰাস কৰা হয়। নেট পৰিৱৰ্তন হৈছে...
A4% হ্ৰাস পায়
B4% বৃদ্ধি
Cকোনো পৰিৱৰ্তন নাই
D2% হ্ৰাস পায়
Answer & Solution
Correct answer: A. 4% হ্ৰাস পায়
**ক্ৰমিক শতাংশ পৰিৱৰ্তন:** a + b + ab/100 = 20 + (-20) + (20)(-20)/100 = -4%।
সমতুল্যভাৱে 1.20 x 0.80 = 0.96 = 4% হ্ৰাস।
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