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Plumbing and pipe-fitting require many of the same skills. If the wage paid to pipe-fitters increased then the effect on the market for plumbers would probably be:

A. An increase in demand

B. A decrease in demand

C. An increase in supply

D. A decrease in supply

Correct Answer : D.


As both jobs require almost same skills so workers choose whether to sell their services as pipe-fitters or as plumbers. An increase in pipe-fitter wages would reduce the supply of plumbers.}

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