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09 Apr 2016, 04:45
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E
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Difficulty:
25%
(medium)
Question Stats:
75% (01:43) correct
25%
(01:35)
wrong
based on 1012
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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
(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
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
09 Apr 2016, 06:12
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email2vm
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
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 = $0.5 per pound
F not known
Insuff
2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds
Again we can just say that 10-8 =2 pound cost $1 or x = 1/2 = $0.5..
F not known
Insuff
where you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E
09 Apr 2016, 07:38
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email2vm
chetan2u
Hi,
this Q tells you that the total consist of two items
1) Fixed charge , say F
2) variable charge per pound say x per pound..
lets see the statements
1> The total cost to pick 8 pounds of apples at this orchard is 1.50$ 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 = $0.5 per pound
F not known
Insuff
2> The total cost to pick 10 pounds of apples at this orchard is 1.00$ more than the total cost to pick 8 pounds
Again we can just say that 10-8 =2 pound cost $1 or x = 1/2 = $0.5..
F not known
Insuff
where you are going wrong is that you are not realizing that when you subtract TOTAL cost of two different quantities, ONLY variable is left .FIXED charge gets cancelled out ..
E
Chetan,
Isn't the questions saying:
T=F+x
The total cost to pick 8 pounds of apples at this orchard is 1.50$ 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
