A man buys a dozen cameras for $1800. He sells them at a profit of $36 each. Find his profit as a percentage of the selling price.

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The man buys a dozen or 12 cameras for $1800. They are sold at a profit of $36 each.

The initial cost of each camera is $1800/12 = $150. The profit made for the investment of $150 in buying a camera is $36. This gives the selling price as $150 + $36 = $186.

The profit as a fraction of the selling price is $36/$186 = 0.1935

In terms of percentage it is 0.1935*100 = 19.35%

The profit made as a percentage of the selling price is 19.35%.

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