एक राशि में पहले 20% की कमी होती है, फिर 20% की वृद्धि होती है। कुल शुद्ध परिवर्तन क्या है?
Aकोई परिवर्तन नहीं
B8% की कमी
C4% की वृद्धि
D4% की कमी
Answer & Solution
Correct answer: D. 4% की कमी
शुद्ध परिवर्तन सूत्र: x + y + (xy / 100) = -20 + 20 + (-400 / 100) = -4% (अर्थात 4% की कमी)।
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