Question : Find the Arc Elasticity of demand if the quantity demanded falls from 4600 to 4200 when the price of the item increases from Rs. 960 to Rs. 1000.
Option 1: - 2.23
Option 2: -2.09
Option 3: 2.23
Option 4: 2.09
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Correct Answer: - 2.23
Solution : The correct option is -2.23.
Arc elasticity is the elasticity of one variable with respect to another between two given points. It is used when there is no general way to define the relationship between the two variables. Arc elasticity is also defined as the elasticity between two points on a curve.
Arc Elasticity = [(Q2 - Q1)/((Q2 + Q1)/2)]/[(P2 - P1)/((P2 + P1)/2)]
Q1 = 4600, Q2 = 4200, P1 = Rs. 960, P2 = Rs. 1000
Arc Elasticity = [(4200 - 4600)/((4200 + 4600)/2)]/[(1000 - 960)/((1000 + 960)/2)]
Arc Elasticity = (-1/11)/(2/49)
Arc Elasticity = -49/22 = -2.23.
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Question : The law of demand states that:
Option 1: if the price of a good increases, the demand for that good decreases
Option 2: if the price of a good increases, the demand for that good increases
Option 3: if the price of a good increases, the quantity demanded of that good decreases
Option 4: if the price of a good increases, the quantity demanded of that good increases
Question : If a man reduces the Selling Price of a fan from Rs. 1,250 to Rs. 1,000, his loss increases by 10%. The Cost Price of the fan is:
Option 1: Rs. 2,400
Option 2: Rs. 2,450
Option 3: Rs. 2,500
Option 4: Rs. 2,350
Question : An article was sold at Rs. 950, allowing a 5% discount on the marked price. The marked price of the article is:
Option 1: Rs. 960
Option 2: Rs. 1000
Option 3: Rs. 955
Option 4: Rs. 945
Question : A unit price elastic demand curve will touch
Option 1: Both price and quantity axis .
Option 2: Neither price axis , nor quantity axis.
Option 3: Only price axis .
Option 4: Only quantity axis .
Question : A reduction of 21% in the price of an item enables a person to buy 3 kg more for Rs. 100. The reduced price of the item per kg is:
Option 1: Rs. 5.50
Option 2: Rs. 7.50
Option 3: Rs. 10.50
Option 4: Rs. 7
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