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Malik's recipe for 4 servings of a certain dish requires 3/2 [#permalink]

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12 Oct 2008, 21:16

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Malik's recipe for 4 servings of a certain dish requires 3/2 cups of pasta. According to this recipe, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

(1) The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish. (2) Malik used 6 cups of pasta the last time he prepared this dish.

Malik's recipe for 4 servings of a certain dish requires 3/2 [#permalink]

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16 Nov 2011, 13:19

Malik's recipe for 4 servings of a certain dish requires 3/2 cups of pasta. According to this recipe, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

(1) The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish. (2) Malik used 6 cups of pasta the last time he prepared this dish.

How to solve this question guys? Can someone please tell?
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Problem: To find out number of cups of pasta that Malik will use the next time he prepares this dish? Statement - 1.5 cups needed for 4 servings

A) Talks about information related to last time he prepared the dish - Not sufficient

B) Gives the information about the last time he prepared the dish. No relation given to his Next preperation. Not Sufficient alone.

A and B together. 1.5 Cups -> 4 servings 6 Cups will give 16 servings. From B From A we know that he will Prepare 8 servings. Hence he would need 8/(4/1.5) = 3 Cups.

Both A and B together solve the Problem. Hence C
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Statement 1 says - (1) The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish.

I interpreted this as next time he will prepare half of 4 servings which is 2 so he will need half of 1.5 cups of pasta !!

Then answer is A

Please advise

No, that's not a correct interpretation. The stem just gives us the info about the recipe for 4 servings, it doesn't say that Malik prepared 4 servings last time.

Also if you take last time to be 4, then this would be in contradiction with statement (2), because from it we get that last time Malik prepared 16 servings (6 cups of pasta are needed for 16 servings).

On the GMAT, two data sufficiency statements always provide TRUE information and these statements never contradict each other or the stem.

So, this should have been a hint that your reading of the question was not correct.

Concentration: Entrepreneurship, International Business

GMAT 1: 730 Q50 V39

GPA: 3.2

WE: Education (Education)

Re: Malik's recipe for 4 servings of a certain dish requires 3/2 [#permalink]

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25 Feb 2013, 11:42

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The difference in understanding is because the initial author calculated in terms of number of servings while you calculated directly based on the number of cups of Pasta

What you did gives you the answer on the combined step itself and you don't need the last step "From A we know that he will Prepare 8 servings. Hence he would need 8/(4/1.5) = 3 Cups."

However, if you calculated based on the number of servings, it would have worked out as shown below

1.5 cups of pasta needed for making 4 servings. based on statement 2, 6 cups of Pasts will give us 6*4/1.5=16 servings. --a

These 16 servings were made last time. We know from statement 1

Number of servings next time= half the number of servings of pasta that he made last time.

Hence, next time servings=8

how many cups of pasta would be required to make 8 servings of pasta?

4 servings=1.5 cups of pasta 8 servings=3 cups of pasta (8/(4/1.5) = 3 Cups.)

Hope this helps!

fozzzy wrote:

Statement 1

Next time = 1/2 last time - we don't have any other info

Statement 2

Last time = 6

Combined

6/2 = 3?

From A we know that he will Prepare 8 servings. Hence he would need 8/(4/1.5) = 3 Cups.

Malik's recipie of 4 servings of a certain dish requires a 1.5 cups of pasta.According to this recipie what is the number of cups of pasta malik will use the next time he prepares the dish ?

a. the next time he prepares the dish mailk will use half as many servings as he did the last time he prepares the dish. b. Malik used 6 cups of pasta the last time he prepared the dish.

Here, my main doubt is the first sentences " Malik 's recipie of 4 servings of a certain dish requires a 1.5 cups of pasta " is a ratio or a data. If it is a data, the " last time " mentioned in the option A refers to this last. I mean did he prepared 4 servings of certain dish last time.I assumed this way but the my answer is wrong.
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Malik's recipie of 4 servings of a certain dish requires a 1.5 cups of pasta.According to this recipie what is the number of cups of pasta malik will use the next time he prepares the dish ?

a. the next time he prepares the dish mailk will use half as many servings as he did the last time he prepares the dish. b. Malik used 6 cups of pasta the last time he prepared the dish.

Here, my main doubt is the first sentences " Malik 's recipie of 4 servings of a certain dish requires a 1.5 cups of pasta " is a ratio or a data. If it is a data, the " last time " mentioned in the option A refers to this last. I mean did he prepared 4 servings of certain dish last time.I assumed this way but the my answer is wrong.

For 4 servings of certain pasta dish he would need 1.5 cups of pasta. to serve for four people he would need 1.5 cups of pasta to prepare the final dish. so in essence it is a ratio. servings/cups of pasta = 4/1.5.

using stmt 1 or 2 alone we cannot deduce the answer. But using both we have enough information to deduce the answer.

Malik's recipe for 4 servings of a certain dish requires 3/2 cups of pasta. According to this recipe, what is the number of cups of pasta that Malik will use the next time he prepares this dish?

(1) The next time he prepares this dish, Malik will make half as many servings as he did the last time he prepared the dish. (2) Malik used 6 cups of pasta the last time he prepared this dish.

Re: Malik's recipe for 4 servings of a certain dish requires 3/2 [#permalink]

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11 May 2015, 04:02

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4 servings of dish require 1.5 cups of pasta => 1 serving of dish require 1.5/4 cups of pasta (1) is insufficient because it just says: "Malik will make half as many servings as he did the last time he prepared the dish.". However, we don't know how many servings he prepared last time. Since we don't know the servings, we can't find how much pasta is required. So, insufficient.

(2) says Malik used 6 cups of pasta the last time he prepared this dish. Just looking at this statement in isolation, if 6 cups of pasta the last time, we clearly can't say how many cups of pasta Malik will use the "next time". So, insufficient.

Combining (1) and (2), we know that he used 6 cups of pasta the last time and Malik will make half as many servings as he did the last time. That being the case, Malik will clearly require 3 cups of pasta next time. Sufficient.

Re: Malik's recipe for 4 servings of a certain dish requires 3/2 [#permalink]

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04 Jan 2018, 18:02

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