Bad Weather

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Dean Jones: Master | Next Rank: 500 Posts; Posts: 239; Joined: Thu Oct 28, 2010 8:40 amFollowed by: 2 members; Location: India; Thanked: 5 times; GMAT Score:690

by Dean Jones » Sat Oct 22, 2011 2:11 am

Hi Guys,

I am having difficulty in solving the below mentioned problem.

Please help.

Mayville Airport and Newcomb Airport have the same number of flight departures each day. Mayville Airport experiences 26 departure delays per 100 flights, while Newcomb Airport experiences 20 departure delays per 100 flights. When delays caused by bad weather are disregarded, Mayville Airport has 5 fewer departure delays per 100 flights than Newcomb Airport does. Which of the following conclusions is best supported by the information given above?

"¢ Bad weather causes a greater number of departure delays at Mayville Airport than at Newcomb Airport.
"¢ On average, the weather at Mayville Airport is worse than it is at Newcomb Airport.
"¢ Mechanical problems cause a greater number of delays at Newcomb Airport than at Mayville Airport.
"¢ The fleet of airplanes leaving from Newcomb Airport is better equipped to handle inclement weather than the fleet
of airplanes leaving from Mayville Airport.
"¢ Mayville Airport experiences a greater number of arrival delays per 100 flights than Newcomb Airport does.

OA after some discussion

Source: Beat The GMAT — Critical Reasoning | Sat Oct 22, 2011 2:11 am

vaibhavgupta: Master | Next Rank: 500 Posts; Posts: 416; Joined: Tue Aug 30, 2011 2:18 pmFollowed by: 9 members; Location: Delhi, India; Thanked: 13 times

by vaibhavgupta » Sat Oct 22, 2011 3:08 am

IMO A

C talked about mechanical problems
D no evidence on such
E " Mayville Airport has 5 fewer departure delays per 100 flights than Newcomb Airport does."
this lines makes E wrong.

I had Kept B but felt that it is not been supported really.

Whts the OA?

mankey: Legendary Member; Posts: 627; Joined: Thu Jun 23, 2011 9:12 amFollowed by: 1 member; Thanked: 4 times

by mankey » Sat Oct 22, 2011 4:35 am

I will go for A. What is the OA?

krishnakumar.ks: Senior | Next Rank: 100 Posts; Posts: 65; Joined: Mon Apr 04, 2011 6:22 am; Thanked: 4 times

by krishnakumar.ks » Sat Oct 22, 2011 4:58 am

I would go with A.

B is really close but it only says the weather is worse. How worse or is it really worse enough to create delays in flight departures is not known.

rohit_gmat: Master | Next Rank: 500 Posts; Posts: 158; Joined: Wed Jun 16, 2010 8:21 amFollowed by: 1 member; Thanked: 13 times

by rohit_gmat » Sat Oct 22, 2011 9:49 pm

IMO A

Cheese12: Senior | Next Rank: 100 Posts; Posts: 47; Joined: Wed Nov 24, 2010 12:57 am; Thanked: 3 times

by Cheese12 » Sat Oct 22, 2011 10:01 pm

IMO : A...i was first stuck between A and C ....C talks about mechanical problems which wasnt mentioned in the paragraph... so eliminated it.

Dean Jones: Master | Next Rank: 500 Posts; Posts: 239; Joined: Thu Oct 28, 2010 8:40 amFollowed by: 2 members; Location: India; Thanked: 5 times; GMAT Score:690

by Dean Jones » Sun Oct 23, 2011 10:54 am

OA is A. I was thinking that the actual number of delays are not given so how can we talk of greater number of delays. In the question only a percentage (delays per 100) is given. Can anyone please explain.

krishnakumar.ks: Senior | Next Rank: 100 Posts; Posts: 65; Joined: Mon Apr 04, 2011 6:22 am; Thanked: 4 times

by krishnakumar.ks » Sun Oct 23, 2011 11:59 am

Dean Jones wrote:OA is A. I was thinking that the actual number of delays are not given so how can we talk of greater number of delays. In the question only a percentage (delays per 100) is given. Can anyone please explain.

Assume that only 100 flights departure from both the airports and proceed. Assumption here is not harmful because we are assuming one of the exact possibilities.

David@VeritasPrep: GMAT Instructor; Posts: 2193; Joined: Mon Feb 22, 2010 6:30 pmFollowed by: 512 members; Location: Vermont and Boston, MA; Thanked: 1186 times; GMAT Score:770

by David@VeritasPrep » Sun Oct 23, 2011 5:50 pm

You can use the number per 100 flights to guide you.

Mayville Airport experiences 26 delays per 100 flights and Newcomb 20.

But if you take away the weather delays Newcomb now has 5 more delays per 100 than Mayville. So that means 11 more flights per 100 are delayed by weather at Mayville.

Dean Jones - I think the bit of information you have to integrate is from the first sentence, "Mayville Airport and Newcomb Airport have the same number of flight departures each day." They have the same number of flights, so the flights per 100 can be used, since they each have the same number of flights per day.

You can even do as krishnakumar.ks has suggested and hypothetically say that they only have a total of 100 flights in a day. The actual number does not matter, only because it is the same.

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