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Hello All,
I am a little confused. It can be that jackmanii is the number 1 sold clematis vine of the biggest nursery in NA and at the same time, that some other variety of clematis is the most popular among gardeners in NA.
In other words, the biggest nursery isn't necessarily representative of all gardeners when it comes to popularity of clematis.
For example, the most sold juice from NA's biggest juice factory could be orange juice, but it could be that all other factories in NA only produce apple juice.
Could someone please elaborate? I'm quite new to the GMAT.
Thanks
Your reasoning is correct -- just because some variety of clematis is the most popular clematis at some particular nursery, it isn't
necessarily the "most popular among gardeners in North America." In other words, there is definitely a hole in this argument.
But the question isn't asking whether there's a hole in the argument (which again -- there definitely is). The question is asking "which of the following is an
assumption on which the argument
depends."
So we're looking for something that is
necessary for the argument to hold up. However, that doesn't mean it will prove the argument correct. In this case, actually, the right answer definitely doesn't
prove that the conclusion is correct. But it is
necessary for the argument to hold up.
For a more detailed analysis of this issue, plus an explanation of why (A) is correct, check out
this post, and let us know whether that clears it up!
Queen789 wrote:
What if there are exactly 10 varieties and all are sold equally?
If there were exactly ten varieties sold, then the 10% sales of the jackmanii could NOT represent the largest percentage. And if the sales of jackmanii could not represent the largest percentage, then the argument falls apart.
To see why this is the case, consider the instance where exactly ten varieties of clematis are sold. Given this fact, can we imagine a scenario where 10% is the highest percentage?
To achieve this, we'd want the percentages for each of the other varieties of clematis to be as
small as possible. And to do that, we'd want to divide the remaining 90%
equally among the remaining 9 varieties. Doing this, we'd get that each variety accounts for 10% of the sales, so jackmanii would not be the most popular. In fact, it would be tied for first place with 9 other varieties.
As a follow up -- what if some of the remaining 9 varieties represented less than 10%? For instance, what if the first eight accounted for only 1% in total? Then, to bring the total to 100%, the ninth one would have to account for 89%, which would make it far more popular than the jackmanii.
In short, no matter what scenario you imagine, if there are exactly 10 varieties of clematis, the jackmanii can't be the most popular. So the argument falls apart, and (A) is correct.
I hope that helps!
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