(a)
Percentage change in price:
=10080−100×100=−20%
Percentage change in quantity:
=25Q2−25×100=4Q2−100
PED= Percentage change in quantity divided by percentage change in price.
−1.5=−204Q2−100
⟹Q2=32.5=33
(b)
Cross price elasticity of demand is given by percentage change in quantity of X divided by percentage change in price of Y.
Percentage change in quantity of X:
=33Q2−33×100=3.03Q2−100
Percentage change in price of Y:
=3535−30×100=14.3
⟹1=14.33.03Q2−100
Q2=37.72=38.
(c)
The total revenue of hotel madrilena will increase.
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