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The table above shows the amount of waste material, in tons

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The table above shows the amount of waste material, in tons [#permalink] New post 01 Nov 2009, 12:13
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Difficulty:

  45% (medium)

Question Stats:

62% (02:23) correct 38% (01:29) wrong based on 211 sessions
Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table?

A. A
B. B
C. C
D. D
E. E
[Reveal] Spoiler: OA

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Re: GMAT Prep 2 [#permalink] New post 01 Nov 2009, 13:22
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Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table?

A. A
B. B
C. C
D. D
E. E

Question asks to determine lowest ratio of amount disposed / amount recycled.

(A) 142,800 / 16,700 = ~ 8 - 9

(B) 48,000 / 8,800 = ~ 6

(C) 51,400 / 13,000 = ~4

(D) 20,300 / 3,900 = ~ 5

(E) 16,200 / 3,300 = ~ 5

Answer: C.

My advice is before doing calculations estimate the numbers and start with the easiest. No need for exact numerical values, so good approximation will work in this case.
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ratio [#permalink] New post 01 Apr 2012, 09:00
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such questions do not ask you to precisely calculate the numbers, thereby asking you to rather estimate.

a) \frac{143}{17} ~some big number

b) \frac{48}{9} ~ 5+

c) \frac{51}{3} ~4

d) \frac{20}{4} ~5

e) \frac{16}{3} ~5

C is the lowest and is the correct ans.
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Re: The table above shows the amount of waste material, in tons [#permalink] New post 24 Jun 2013, 03:04
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Re: The table above shows the amount of waste material, in tons [#permalink] New post 03 Sep 2013, 05:13
Hello members,

Since the purpose of this question is to practise estimation, I will explain here an interesting way. Start by multiplying denominator by 10 and see if numerator is greater than or less than denominator multiplied by 10. If numerator is less, half the (denominator*10) and see if it less or greater than the new numerator .

[162/33] , here 33x10=330, 330>162, 330/2=165, 165>162 (this means that numerator is around 4 times the denominator)

[203/39], here 39x10=390, 390>203, 390/2=195, 195<203 (this means that numerator is more than 5 times denominator)

[514/130], here 130x10=1300, 1300>514, 1300/2=650, 650 >514 (this means that numerator is less than 5 times and infact a little calculation will show that it is less than 4 times the numerator)

[480/88], here 88x10=880, 880>480, 880/2=440, 440<480 (this means that numerator is more than 5 times the denominator)

[1428/167], here 167x10=1670, 1670>1428, 1670/2=835, 835 < 1428 (this means that numerator is much more than 5 times the denominator)

By finding this strategy, we can see that [514][/130] yields the lowest fraction.
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Re: The table above shows the amount of waste material, in tons [#permalink] New post 21 Jul 2014, 10:35
Hi all,

Could someone help me with the phrasing?
The question asks for the lowest ratio ... yet the right aswer is the highest ratio.
I mean for A: there is 9:1 ... 9 waste to 1 recycled
for C: there is 3:1 ... 3 waste to 1 recycled

I would assume that the higher number (9/1=9; 3/1=3) would mean a lower ratio.
If you try to make sense of the ratio than the ratio is high e.g. 1:2 or 1:10 etc... the higher the recycled part the higher the ratio is.

Thanks
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Re: The table above shows the amount of waste material, in tons [#permalink] New post 21 Jul 2014, 10:46
Expert's post
bigzoo wrote:
Hi all,

Could someone help me with the phrasing?
The question asks for the lowest ratio ... yet the right aswer is the highest ratio.
I mean for A: there is 9:1 ... 9 waste to 1 recycled
for C: there is 3:1 ... 3 waste to 1 recycled

I would assume that the higher number (9/1=9; 3/1=3) would mean a lower ratio.
If you try to make sense of the ratio than the ratio is high e.g. 1:2 or 1:10 etc... the higher the recycled part the higher the ratio is.

Thanks


Lowest ratio is lowest number.
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NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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: The table above shows the amount of waste material, in tons   [#permalink] 21 Jul 2014, 10:46
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