90-120, 120-150 ക്ലാസുകളിലെ ക്ലാസ് മാർക്കുകളുടെ ആകെത്തുക:

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NTPC CBT-I (Held On: 5 Jan 2021 Shift 2)
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  1. 210
  2. 170
  3. 220
  4. 240

Answer (Detailed Solution Below)

Option 4 : 240
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Detailed Solution

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ഉപയോഗിച്ച സൂത്രവാക്യം:

ക്ലാസ് മാർക്ക് = (താഴ്ന്ന പരിധി + ഉയർന്ന പരിധി)/2

കണക്കുകൂട്ടൽ:

90-120, 120-150 = (90 + 120)/2 + (120 + 150)/2 എന്നീ ക്ലാസ് മാർക്കുകളുടെ ആകെത്തുക

⇒ 210/2 + 270/2 = 105 + 135 = 240

∴ ആവശ്യമായ ഫലം = 240

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