Initially MUXPX=MUYPY. With a fall in the price of Y, the consumption of the commodity-Y:
A
diminishes
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B
increases
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C
remains constant
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D
becomes zero
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Solution
The correct option is B increases When consumer
consumes two commodities, then equilibrium is achieved when consumer equates
the ratio of marginal utility derived from one commodity in comparison to it's
price with the ratio of the marginal utility of another commodity in comparison
to it's price. So when the price of Y decreases it will increase the ratio of marginal utility of Y with it's price. Therefore, consumption of Y will be increased in order to decrease it's marginal utility to equate the ratio from with other commodity.