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Bunuel
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Option E- The manufactures will produce as per the demand. But in actual the buyers wont buy the boats as per the demands. Hence boats that wont be sold will cause loss to the manufacturer. Hence, undermines the argument.
Is this correct?
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Hi Bunuel can you please share the OE?
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Hi Bunuel can you please share the OE?
I’m no expert but I’ll try to explain why E is the right answer. The argument says that the boat manufacturers can meet 30% demand of the potential buyers. So if 75 out of 100 people are interested and the manufacturers can meet the demands of 0.3*75 so approx 22 people, then E says he will be able to sell 11 boats out of the 22 he has in his inventory and thus face losses. So option E weakens the argument.

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Bunuel
Investing in fishing-boats could be very profitable at this time. A survey made by "Hook, Line and Sinker" magazine shows that 75 percent of the magazine's readers want to buy a new fishing-boat during the summer. However, fishing-boat manufacturers can only produce enough boats to satisfy 30% of total potential buyers.

Which of the following, if true, would undermine the soundness of the investment advice in the paragraph above?

A. Fishing-boats cost too much for the average fisherman.

B. Approximately a quarter of all fishermen do not use fishing-boats.

C. Approximately a quarter of all fishermen buy fishing-boats that can accommodate 2-3 fishermen.

D. Only half of all fishermen use a fishing-boat.

E. Only half of those who say they want to buy a fishing-boat actually end up buying one.

The advice in the paragraph says investing in fishing-boats could make a lot of money because 75% of readers of a fishing magazine want to buy a new boat, but only 30% of the total potential buyers can be satisfied due to limited production. Option E undermines this advice by saying that only half of the readers who say they want to buy a fishing-boat actually buy one. This means that the actual demand for fishing-boats may not be as high as initially thought, which would make investing in fishing-boats less profitable than expected. The other options are less likely to undermine the advice because they don't affect the demand for fishing-boats among the magazine's readers.
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E is strenthening the argument as it is saying that the investment is good. Aren't we supposed to undermine this fact? And to weaken the argument, D seems to be the apt choice here.
PyjamaScientist
(E) (kinda).

I am not totally sold by it. But, the rest of the choices are too off the topic here. So, only(E) cuts the mark (again kinda).

Say among 100 readers, 75 want to buy a boat. Argument says these 75 people "want" to buy, not that they actually end up buying one. And the argument is kind of based on the Demand-vs-Supply dynamics that will be in favour of those investing in boats. But, if the "expected demand" is all but "air", then the idea of investing in boats will seem poor.

(E) says that only half end up buying boats eventually, so about 32-33 people out of 75 end up buying the boat. But only, 30 of them would get it. So, even in that case Demand still is greater than Supply, so there still are chances of "some profit" here. But, if I put myself into the shoes of a potential investor, this new information sure would make me "think twice" about investing in boats. Hence, (E).
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