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DS - word problem

by sl750 » Tue Aug 02, 2011 10:47 pm
Jerry buys six 25 lb. bags of dog food. He has to carry those bags from his car into his kitchen. Does Jerry make more than three trips?

(1) Jerry can carry no more than 50 lbs.

(2) Jerry does not carry the same number of bags on every trip.


I didn't understand the solution. Can someone please explain
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by Sanjay2706 » Tue Aug 02, 2011 11:32 pm
What's the OA?
IS it B?
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by gmatboost » Wed Aug 03, 2011 8:38 am
If I am interpreting Statement 2 correctly, this question is invalid.

Jerry has 6 bags, weighing 25 pounds each, for 150 pounds total. Does he make more than 3 trips?

Statement 1: Since Jerry can carry 50 pounds, he can carry 2 bags at a time if he wants to. So, he could make it in three trips: 2, 2, 2. Or, he could take it easy and make it in more than 3 (for example: 2, 1, 1, 1, 1). Insufficient.

Statement 2: I think what this means is that he must carry a different number on each trip. The wording is not totally clear. Assuming that is the case, the only way he can carry 6 bags inside without carrying the same number on any trip is to carry 1, 2, and 3. So this means he must take exactly three trips. Sufficient.

But, the conclusion in Statement 2 is in violation of Statement 1, because Statement 1 says that he CANNOT carry three bags at once.
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by sl750 » Wed Aug 03, 2011 12:08 pm
I agree, I did not follow the original explanation. The answer is C

Thanks for the explanation though
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by BlindVision » Wed Aug 03, 2011 7:30 pm
sl750 wrote:Jerry buys six 25 lb. bags of dog food. He has to carry those bags from his car into his kitchen. Does Jerry make more than three trips?

(1) Jerry can carry no more than 50 lbs.

(2) Jerry does not carry the same number of bags on every trip.


I didn't understand the solution. Can someone please explain
B
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by dell2 » Sat Jan 21, 2012 9:35 am
It's important to note that this does not ask about the minimum number of trips. It asks about the exact number.

Statement (1): If Jerry can carry a maximum of 50 lbs, then he can carry two of the bags at one time. He can complete this task in three trips. However, we do not know for certain that he will carry two bags every trip. INSUFFICIENT.

Statement (2): We do not know how many bags Jerry can carry. If Jerry can carry four bags in a single trip, he could make only two trips. If he can only carry two bags, he would have to make more than three (two trips with two bags and two trips with one bag.) Note the different between the phrase "every trip" and "any trip". "Every trip" means that he may repeat the number of bags carried, but not such that it's the same for every trip he makes.

INSUFFICIENT

Statement (1) tells us how many bags Jerry can carry, and Statement (2) tells us he does not carry two bags on every trip to make the minimum number of trips. Therefore he makes more than three trips. SUFFICIENT.


The credited response is (C):
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