In ₹150, B buys 10 pens for ₹8 each, 10 erasers for ₹5 each and some sharpeners for ₹4 each. What is the average price per item in ₹?

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SSC CGL 2023 Tier-I Official Paper (Held On: 19 Jul 2023 Shift 3)
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  1. 8
  2. 7
  3. 10
  4. 6

Answer (Detailed Solution Below)

Option 4 : 6
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Detailed Solution

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Given : 

B buys 10 pens for ₹8 each.

10 erasers for ₹5 each.

Some sharpeners for ₹4 each.

Formula Used : 

Average = Sum of all observations/Number of observations

Calculation : 

⇒ 150 = 10 × 8 + 10 × 5 + 4 × x

⇒ 150 = 80 + 50 + 4x

⇒ 4x = 20

⇒ x = 5

Average = 150/(5 + 10 + 10) = 150/25 = 30/5 = 6

∴ The correct answer is 6.

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