Question
Download Solution PDFఒక సంఖ్యను 30% పెంచి, తరువాత పెరిగిన సంఖ్యను 30% తగ్గిస్తారు. నికర పెరుగుదల లేదా తగ్గుదల:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFఇచ్చింది:
ఒక సంఖ్యను 30% పెంచి, తరువాత పెరిగిన సంఖ్యను 30% తగ్గిస్తారు.
ఉపయోగించిన సూత్రం:
ఒకవేళ ఒక సంఖ్య మొదట a % పెరిగినట్లయితే, తరువాత మళ్లీ a % తగ్గినట్లయితే, అది ఎల్లప్పుడూ ఇలా తగ్గాలి.
(a/10)2 %
గణన:
కాబట్టి తగ్గిన శాతం,
⇒ (30/10)2 % = 9 % తగ్గుదల
∴ సరైన ఎంపిక 2
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