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M70-39

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M70-39  [#permalink]

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New post 04 Sep 2018, 02:44
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A
B
C
D
E

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Question Stats:

60% (01:34) correct 40% (01:46) wrong based on 5 sessions

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A praline box contained 10 milk chocolate pralines, 6 bitter chocolate pralines and 4 white chocolate pralines. To this amount were added x pralines, out of which \(y\%\) were milk chocolate. Of the new amount of pralines, are more than half milk chocolate?



(1) \(x=8\)

(2) \(y=60\)

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Re M70-39  [#permalink]

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New post 04 Sep 2018, 02:44
Official Solution:


We’ll go for LOGICAL because that is our first choice in Data Sufficiency.

The question asks us about the new percentage of milk chocolate pralines, so we’ll start by finding the original percentage: \(\frac{10}{10 + 6 + 4}=\frac{10}{20}=\frac{1}{2}= 50\%\). So, we are being asked whether the new pralines increased the milk chocolate percentage. (1) Knowing the number of pralines added without knowing their composition doesn’t help us determine the new percentage. (A) and (D) are eliminated. (2) If the percentage of milk chocolate in the added pralines is greater than the percentage in the original amount, the new amount must have an increased percentage. (C) and (E) are eliminated.


Answer: B
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New to the Math Forum?
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Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: M70-39  [#permalink]

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New post 05 Sep 2018, 11:16
Bunuel wrote:
Official Solution:


We’ll go for LOGICAL because that is our first choice in Data Sufficiency.

The question asks us about the new percentage of milk chocolate pralines, so we’ll start by finding the original percentage: \(\frac{10}{10 + 6 + 4}=\frac{10}{20}=\frac{1}{2}= 50\%\). So, we are being asked whether the new pralines increased the milk chocolate percentage. (1) Knowing the number of pralines added without knowing their composition doesn’t help us determine the new percentage. (A) and (D) are eliminated. (2) If the percentage of milk chocolate in the added pralines is greater than the percentage in the original amount, the new amount must have an increased percentage. (C) and (E) are eliminated.


Answer: B



Hi Bunuel

While I thank you for the high quality questions you posted recently, I was disappointed in the way you organized the official solution. it is a total mess with one paragraph with full of info. :oops: :?

I hope you help us like all your old posts in GC answers.
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Re: M70-39 &nbs [#permalink] 05 Sep 2018, 11:16
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