Author 
Message 
TAGS:

Hide Tags

Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 149
Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23 GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)

The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
09 Apr 2016, 04:45
3
This post received KUDOS
14
This post was BOOKMARKED
Question Stats:
69% (00:39) correct 31% (00:37) wrong based on 485 sessions
HideShow timer Statistics
The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard? 1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds 2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds Sol>
let T be the total cost/pound which includes fixed+additional charge
st1>
8T=5T+1.5 therefore T=0.5 sufficient
st2> like st1, st2 is sufficient
but I am wrong?
Am I missing something?
Ravi
Official Answer and Stats are available only to registered users. Register/ Login.



Math Expert
Joined: 02 Aug 2009
Posts: 5784

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
09 Apr 2016, 06:12
7
This post received KUDOS
Expert's post
4
This post was BOOKMARKED
email2vm wrote: The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard?
1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds 2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds
Sol>
let T be the total cost/pound which includes fixed+additional charge
st1>
8T=5T+1.5 therefore T=0.5 sufficient
st2> like st1, st2 is sufficient
but I am wrong?
Am I missing something?
Ravi Hi, this Q tells you that the total consist of two items 1) Fixed charge , say F 2) variable charge per pound say x per pound.. lets see the statements 1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds here you can easily see that 3 pounds cost 1.5 or x is 1.5/3 = $0.5 per pound F not known Insuff2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds Again we can just say that 108 =2 pound cost $1 or x = 1/2 = $0.5.. F not known Insuffwhere you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E
_________________
Absolute modulus :http://gmatclub.com/forum/absolutemodulusabetterunderstanding210849.html#p1622372 Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
GMAT online Tutor



Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 149
Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23 GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
09 Apr 2016, 06:32
1
This post received KUDOS
chetan2u wrote: Hi, this Q tells you that the total consist of two items 1) Fixed charge , say F 2) variable charge per pound say x per pound.. lets see the statements 1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds here you can easily see that 3 pounds cost 1.5 or x is 1.5/3 = $0.5 per pound F not known Insuff2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds Again we can just say that 108 =2 pound cost $1 or x = 1/2 = $0.5.. F not known Insuffwhere you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E Chetan, Isn't the questions saying: T=F+x The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost (and not the x (variable)) to pick 5 pounds St1> 8T =5T+1.5? and the question is asking for The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard?



Math Expert
Joined: 02 Aug 2009
Posts: 5784

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
09 Apr 2016, 07:38
2
This post received KUDOS
Expert's post
1
This post was BOOKMARKED
email2vm wrote: chetan2u wrote: Hi, this Q tells you that the total consist of two items 1) Fixed charge , say F 2) variable charge per pound say x per pound.. lets see the statements 1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds here you can easily see that 3 pounds cost 1.5 or x is 1.5/3 = $0.5 per pound F not known Insuff2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds Again we can just say that 108 =2 pound cost $1 or x = 1/2 = $0.5.. F not known Insuffwhere you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E Chetan, Isn't the questions saying: T=F+x The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost (and not the x (variable)) to pick 5 pounds St1> 8T =5T+1.5? and the question is asking for The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard? hi, the T for 8 pounds = F + 8X and for 5 pounds = F + 5x.. as per st 1 F +8x = F+5x+1.5.. 3x = 1.5.. Hope you have understood
_________________
Absolute modulus :http://gmatclub.com/forum/absolutemodulusabetterunderstanding210849.html#p1622372 Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
GMAT online Tutor



Intern
Joined: 11 May 2016
Posts: 6

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
16 Aug 2016, 20:29
2
This post received KUDOS
You are able to determine the price per pound of apple from both statement 1 and statement 2 ($0.5/pound). However, in order to calculate the total cost to pick 15 pounds, you will also need to know the fixed cost, which is still unknown. Therefore the answer is E.



Intern
Joined: 12 Mar 2015
Posts: 46
GPA: 2.99
WE: Corporate Finance (Aerospace and Defense)

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
22 Jan 2017, 15:13
mzuberi wrote: You are able to determine the price per pound of apple from both statement 1 and statement 2 ($0.5/pound). However, in order to calculate the total cost to pick 15 pounds, you will also need to know the fixed cost, which is still unknown. Therefore the answer is E. Please correct me if I'm wrong, but can't you use the value of the cost of pounds per apple to plug back into the formula to determine F? Or would that be incorrect? Thanks!



Manager
Joined: 08 Feb 2016
Posts: 74
Location: India
Concentration: Technology
GPA: 4

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
14 Feb 2017, 23:51
Even if you plug it back, it will cancel out. Let f= fixed cost ; a= additional cost per pound By st1. f+8a = f+5a + 1.05 a= (1.05/3) = 0.35 Now even if you plug this back, you cannot get 'f' because it gets cancelled out. Hope it's clear. alandizzle wrote: mzuberi wrote: You are able to determine the price per pound of apple from both statement 1 and statement 2 ($0.5/pound). However, in order to calculate the total cost to pick 15 pounds, you will also need to know the fixed cost, which is still unknown. Therefore the answer is E. Please correct me if I'm wrong, but can't you use the value of the cost of pounds per apple to plug back into the formula to determine F? Or would that be incorrect? Thanks!



Manager
Joined: 13 Dec 2013
Posts: 163
Location: United States (NY)
Concentration: Nonprofit, International Business
GMAT 1: 710 Q46 V41 GMAT 2: 720 Q48 V40
GPA: 4
WE: Consulting (Consulting)

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
08 Apr 2017, 11:13
1
This post received KUDOS
2
This post was BOOKMARKED
email2vm wrote: The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard?
1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds 2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds
Sol>
let T be the total cost/pound which includes fixed+additional charge
st1>
8T=5T+1.5 therefore T=0.5 sufficient
st2> like st1, st2 is sufficient
but I am wrong?
Am I missing something?
Ravi Taking 1): f = fixed charge, p=price per pound f+8p=f+5p+1.5 3p=1.5 p=0.5 But, f is still needed. Putting p=0.5 back into the equation: f+4=f+4, so we still don't know what the fixed price is. Same for 2), and combining 1) and 2) does not provide additional info. Kudos if you agree! Comment if you have a better method.



Manager
Joined: 12 Nov 2016
Posts: 82

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
13 Jul 2017, 10:03
chetan2u wrote: email2vm wrote: The total cost to pick apples at a certain orchard consists of a fixed charge plus an additional charge per pound of apples picked. What is the total cost to pick 15 pounds of apples at this orchard?
1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds 2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds
Sol>
let T be the total cost/pound which includes fixed+additional charge
st1>
8T=5T+1.5 therefore T=0.5 sufficient
st2> like st1, st2 is sufficient
but I am wrong?
Am I missing something?
Ravi Hi, this Q tells you that the total consist of two items 1) Fixed charge , say F 2) variable charge per pound say x per pound.. lets see the statements 1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ more than the total cost to pick 5 pounds here you can easily see that 3 pounds cost 1.5 or x is 1.5/3 = $0.5 per pound F not known Insuff2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds Again we can just say that 108 =2 pound cost $1 or x = 1/2 = $0.5.. F not known Insuffwhere you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E Hi Chetan, Can you clarify one point for me: In this case in each of the statements we are able to figure out cost per pound of apples is 0.5. Therefore, for 5 pounds of apples, it should be 2.50. The remaining 2.50 should be the fixed cost!!! Similarly, 8 pounds of apple  8*0.5+2.50=6.50, which is 1.50 as per the stem. What m i missing out here



Intern
Joined: 24 Feb 2017
Posts: 38

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
28 Aug 2017, 01:46
Chets25 wrote: The remaining 2.50 should be the fixed cost!!! Remaining 2.50? Remaining from what? From what I see in the question, it is not mentioned anywhere that 5 pounds cost $5. 5 pounds could cost $10, and the fixed price can be $7.50 5 pounds could cost $100, and the fixed price can be $97.50 Chets25 wrote: let T be the total cost/pound which includes fixed+additional charge
st1>
8T=5T+1.5
Assuming that the total cost/pound is the same for both 8 pounds and 5 pounds is incorrect in this case, because the total consists of 2 parts: a fixed and a variable. Your equation should be: 8(T1) = 5(T2) + 1.5



Intern
Joined: 17 Mar 2017
Posts: 9
GMAT 1: 510 Q47 V15 GMAT 2: 600 Q49 V22

Re: The total cost to pick apples at a certain orchard consists of a fixed [#permalink]
Show Tags
31 Dec 2017, 09:24
chetan2u , From (1) and (2) can we say: (2) is 10p = 1 +8p we replace 8p in the above by (1) and we have (1) + (2): 10p = 1 + 1,5 + 5p = 2,5 + 5p If we multiply each side of the previous by 3: 3 x (10p) = 3 x (2,5 + 5p) so: 30p = 7,5 +15p Thus, 30p15p = 7,5 => 15p = 7,5 I don't see where I can be wrong here, Thanks in advance for your help,




Re: The total cost to pick apples at a certain orchard consists of a fixed
[#permalink]
31 Dec 2017, 09:24






