$60 \%$ of the cost price of an article is equal to $50 \%$ of its selling price. Then the percentage of profit or loss on the cost price is

  • A

    $20 \%$ loss

  • B

    $16 \frac{2}{3} \%$ profit

  • C

    $20 \%$ profit

  • D

    $10 \%$ loss

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