एक दुकानदार एक निवेश पर 10% लाभ कमाता है, परन्तु दूसरे निवेश पर 20% की हानि सहता है। यदि दोनों निवेशों का अनुपात 2 ∶ 3 है, तो संयुक्त हानि प्रतिशत है:

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SSC CGL 2022 Tier-I Official Paper (Held On : 05 Dec 2022 Shift 2)
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  1. 5.5%
  2. 7%
  3. 6%
  4. 8%

Answer (Detailed Solution Below)

Option 4 : 8%
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दिया गया है:

एक दुकानदार एक निवेश पर 10% लाभ कमाता है परन्तु दूसरे निवेश पर 20% की हानि सहता है।

दोनों निवेशों का अनुपात 2 ∶ 3 है।

प्रयुक्त अवधारणा:

भारित औसत, W = \(\frac {\sum^n_{i = 1} X_iW_i}{\sum^n_{i = 1} W_i}\)

W = भारित औसत

n = औसत किए जाने वाले पदों की संख्या

Wi = भार x मानों पर अनुप्रयुक्त होते हैं।

Xi = औसत किए जाने वाले आंकड़ों का मान

गणना:

उनका संयुक्त हानि प्रतिशत

⇒ \(\frac {10 \times 2 - 20 \times 3}{2 + 3}\)(लाभ के विपरीत हानि को ऋणात्मक तरीके से लिया जाता है)

⇒ -8% (ऋणात्मक चिन्ह हानि को दर्शाता है)

संयुक्त हानि प्रतिशत 8% है।

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