Multiple choice

Rajeshwar bought $16$ dozen ball point pens and sold them by and by. Due to a calculation mistake in fixing selling price he lost an amount equal to SP of $4$ dozen pens. Find the loss percent. Find the SP of one dozen pens, if he purchased these $16$ dozen pens for Rs. $240$

  1. Rs. $18$
  2. Rs. $10$
  3. Rs. $12$
  4. Rs. $14$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The total cost of 16 dozen pens is Rs. 240, so the cost per dozen is Rs. 15. If the loss equals the selling price of 4 dozen, then 16 dozen cost equals the selling price of 20 dozen, giving a selling price of Rs. 12 per dozen.

AI explanation

The total cost price for 16 dozen pens is Rs 240, making the cost price per dozen Rs 15. Let the selling price of one dozen pens be S; the total selling price for 16 dozen is 16S. Setting up the loss equation, 240 - 16S = 4S. Solving for S gives 20S = 240, so the selling price of one dozen pens is Rs 12.

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