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Price elasticity of demand when prices are rise

When the prices of generic yachts rise by $500,000 to $600,000, causing yearly sales to drop from 30,000 to 10,000, in that case the price elasticity of demand for such yachts equals: (w) 11.00. (x) 2.75. (y) 5.50. (z) 13.75.

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