वर्गों  90-120 और 120-150 के वर्ग चिन्हो का योग है:

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  1. 210
  2. 170
  3. 220
  4. 240

Answer (Detailed Solution Below)

Option 4 : 240
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सूत्र:

वर्ग  चिन्ह = (निचली सीमा + ऊपरी सीमा)/2

गणना:

वर्गों  90-120 और 120-150 के वर्ग चिन्हो का योग =  (90 + 120)/2 + (120 + 150)/2

⇒ 210/2 + 270/2 = 105 + 135 = 240

अभीष्ट परिणाम  = 240 

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