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Raghu bought toffees at 10 for a rupee. How many for a rupee must he sell to gain 400%?

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RPF Constable 2024 Official Paper (Held On 02 Mar, 2025 Shift 3)
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  1. Four
  2. Two
  3. Three
  4. Five

Answer (Detailed Solution Below)

Option 2 : Two
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Detailed Solution

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Given:

Cost price of 10 toffees = 1 rupee

Gain = 400%

Formula Used:

Selling price = Cost price × (1 + Gain%)

Calculation:

Let the cost price of each toffee be 1/10 rupee.

Gain% = 400%

Selling price of each toffee = Cost price × (1 + Gain%)

Selling price of each toffee = (1/10) × (1 + 400/100)

Selling price of each toffee = (1/10) × (1 + 4)

Selling price of each toffee = (1/10) × 5

Selling price of each toffee = 1/2 rupee

To find how many toffees he must sell for 1 rupee:

Number of toffees = 1 / (1/2)

Number of toffees = 2

Raghu must sell 2 toffees for a rupee to gain 400%.

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-> The Railway Recruitment Board has released the RPF Constable 2025 Response Sheet on 24th March 2025. As per the official notice, the RPF Constable Answer Key will be available from 24th March 2025 to 29th March 2025. 

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