alleryનંબર પહેલા 20% વધાર્યો અને પછી 20% ઘટ્યો. ચોખ્ખો ફેરફાર છે
A4% ઘટાડો
B4% વધારો
Cકોઈ ફેરફાર નથી
D2% ઘટાડો
Answer & Solution
Correct answer: A. 4% ઘટાડો
**ક્રમિક ટકાવારીમાં ફેરફાર:** a + b + ab/100 = 20 + (-20) +
(20)(-20)/100 = -4%.
સમાનરૂપે, 1.20 x 0.80 = 0.96 = 4% ઘટાડો.
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