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TRICKY - Ed caught some fish, and the combined

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Tue Mar 28, 2017 6:54 am

Ed has some fish, and the combined weight of all the fish is 100 pounds. The weights of the fish are all different. Ed gives the 3 heaviest fish to Ann, the 2 lightest fish to Bob, and the remaining fish to Carol. If the combined weight of the 3 heaviest fish is 50 pounds, how many fish does Carol receive?

(1) The combined weight of the fish Carol receives is 30 pounds.
(2) The combined weight of the fish Bob receives is 20 pounds.

Answer: D

Source: www.gmatprepnow.com
Difficulty level: 750+

Last edited by Brent@GMATPrepNow on Wed Mar 29, 2017 4:54 pm, edited 1 time in total.

Brent Hanneson - Creator of GMATPrepNow.com

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Source: Beat The GMAT — Data Sufficiency | Tue Mar 28, 2017 6:54 am

Mo2men: Legendary Member; Posts: 712; Joined: Fri Sep 25, 2015 4:39 amFollowed by: 5 members; Thanked: 14 times

by Mo2men » Wed Mar 29, 2017 3:01 pm

Brent@GMATPrepNow wrote:Ed has some fish, and the combined weight of all the fish is 100 pounds. The weights of the fish are all different. Ed gives the 3 heaviest fish to Ann, the 2 lightest fish to Bob, and the remaining fish to Carol. If the combined weight of the 3 heaviest fish is 50 pounds, how many fish does Carol receive?

(1) The combined weight of the fish Carol receives is 30 pounds.
(2) The combined weight of the fish Bob receives is 20 pounds.

Answer: B

Source: www.gmatprepnow.com
Difficulty level: 750+

Hi Brent,

Really tricky question. But I could not understand why B. I thought it is D.

I look forward to your solution soon.

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Wed Mar 29, 2017 5:04 pm

Mo2men wrote:
Hi Brent,

Really tricky question. But I could not understand why B. I thought it is D.

I look forward to your solution soon.

Yes, I'm looking forward to my solution too!!

. . . . okay, you win; the answer is, indeed, D (I've edited my original post to show D as the correct answer)

For some reason, while creating the question this weekend, I somehow convinced myself that knowing Carol received 30 pounds of fish wasn't enough to conclude that Bob received 20 pounds (even though the total weight is 100 pounds). Yeesh!

I played around with that question for a while before posting, and I quite like it. Perhaps the community members can help make it a true 750+ question. All we need is a tricky replacement for statement 1 that isn't a version/consequence of statement 2.

Any takers?

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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Mo2men: Legendary Member; Posts: 712; Joined: Fri Sep 25, 2015 4:39 amFollowed by: 5 members; Thanked: 14 times

by Mo2men » Wed Mar 29, 2017 7:08 pm

Brent@GMATPrepNow wrote:
Yes, I'm looking forward to my solution too!!

. . . . okay, you win; the answer is, indeed, D (I've edited my original post to show D as the correct answer)

For some reason, while creating the question this weekend, I somehow convinced myself that knowing Carol received 30 pounds of fish wasn't enough to conclude that Bob received 20 pounds (even though the total weight is 100 pounds). Yeesh!

I played around with that question for a while before posting, and I quite like it. Perhaps the community members can help make it a true 750+ question. All we need is a tricky replacement for statement 1 that isn't a version/consequence of statement 2.

Any takers?

Cheers,
Brent

I will start to charge you for changing OA.

:):)

When I read 750+, I feel that you need to do something in statement 1 to make insufficient.

I tried hard to make 1 insufficient. I used many different combinations with average fish weight with Ann and Bob but, due to restrictions in prompt itself, I failed to prove insufficiency.

What about removing that 'Bob has the 2 lightest fish', does it make a difference?

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GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Thu Mar 30, 2017 6:05 am

Mo2men wrote: What about removing that 'Bob has the 2 lightest fish', does it make a difference?

Unfortunately, removing that info would make statement 1 insufficient.

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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