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[email protected]: Legendary Member; Posts: 934; Joined: Tue Nov 09, 2010 5:16 amFollowed by: 14 members; Location: AAMCHI MUMBAI LOCAL; Thanked: 63 times

by [email protected] » Tue May 29, 2012 6:20 am

Malik's recepie for 4 servings of a certain dish requires 1 and a half cups of pastas. According to this recepie, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

I] The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish.

II] Malik used 6 cups of pasta the last time he prepared this dish.

I really do not know how to get the answer. I chose A and got it wrong...

The OA is given as C.

Kindly help guyzzzzzz....

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Source: Beat The GMAT — Data Sufficiency | Tue May 29, 2012 6:20 am

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Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members; Location: Milpitas, CA; Thanked: 1854 times; GMAT Score:770

by Anurag@Gurome » Tue May 29, 2012 6:30 am

[email protected] wrote:Malik's recepie for 4 servings of a certain dish requires 1 and a half cups of pastas. According to this recepie, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

I] The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish.

II] Malik used 6 cups of pasta the last time he prepared this dish.

4 servings require 3/2 cups of pasta.
To determine how many cups of pasta he will use the next time he prepares this dish, we need to know how many servings he is going to make.

Statement 1: We don't know how many servings he made the last time he prepared the dish.

Not sufficient

Statement 2: We don't know what this has to do with what we've asked to determine.

Not Sufficient

1 & 2 Together: Now we know that Malik used 6 cups of pasta the last time he prepared the dish and the next time he prepares it, he will make half as many servings as he did the last time. Hence, he is going to use 6/2 = 3 cups of pasta.

Sufficient

The correct answer is C.

Anurag Mairal, Ph.D., MBA
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Gurome, Inc.
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