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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
this was quite time consuming!...its not a tough problem, but defnitely time consuming. Any shortcuts?..i cant see one.
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
option C... A mentions most expensive and B mentions least expensive.. can A & B both not of same price, making them most expensive? in that case... revenue will be same( e.g. A&B costs $2 & C $1. Then gain from B&C is equal to less than lose from A).
Similarly, if B&C costs same, gain from these will be less than lose from A.
Also, if A=$3(most expensive), B=$2(median), C= $1(least), still there is lose.

Can "most" not apply to 2 items out of 3?
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
Bunuel wrote:

The table above shows quantities of the mobile phone models sold by a retailer. If prices did not change between 2003 and 2004, was the company’s total revenue from sales of these models in 2004 greater than its total revenue from sales of these models in 2003?

(1) Model A was the most expensive phone.
(2) Model C was the least expensive phone.


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Attachment:
phones.gif


1. If the revenue for Model A is 1, and the revenue for Model B and C is .9, the total revenue in 2004 is less than 2003. (15*1) vs (15*.9). Sufficient.

2. If Model C is the least expensive, it really depends on the revenue generated from Model B and Model A as to whether the total revenue increased or decreased. Insufficient.

A
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
[quote="Bunuel"]
The table above shows quantities of the mobile phone models sold by a retailer. If prices did not change between 2003 and 2004, was the company’s total revenue from sales of these models in 2004 greater than its total revenue from sales of these models in 2003?

(1) Model A was the most expensive phone.
(2) Model C was the least expensive phone.


Kudos for a correct solution.


Difference btw the mobile sales for each year is:
A : -15
B : 5
C : 10

Hence, the total number of phones sold by retailer is same each year. Hence to find the difference in revenue, the prices of each model is needed.

St 1: Model A is the most expensive phone but Model A is the phone which has sold least in 2014, compared to 2013. Cost of B and C has to be lower than A. Hence loss incurred by Model A cannot be compensated by Model B and C. Hence the revenue in 2014 will be lower than 2013.
Sufficient.

St 2: Model C is the least expensive phone. If Model A is Most expensive phone, then there will be a loss in revenue. But if Model B is the Most Expensive phone, then there will be gain in the revenue. Plugin numbers to check this. (A = 10, B = 9, C=8 and A = 10, B=50, C = 8 for the two cases). Hence No Sufficient.

Statement 1 alone is sufficient.
Option A.
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
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Bunuel wrote:

The table above shows quantities of the mobile phone models sold by a retailer. If prices did not change between 2003 and 2004, was the company’s total revenue from sales of these models in 2004 greater than its total revenue from sales of these models in 2003?

(1) Model A was the most expensive phone.
(2) Model C was the least expensive phone.


Kudos for a correct solution.

Attachment:
phones.gif


800score Official Solution:

In 2004, the retailer sold 15 fewer Model A phones and 15 more phones that were either model B or C.

Statement (1) tells us that Model A is the most expensive. Since the selling prices remained unchanged, the loss of revenue from selling 15 fewer of the most expensive phone must be greater than the increase in revenue from selling 15 more of the cheaper phone. So revenue must have decreased, and Statement (1) is sufficient.

Statement (2) tells us only that Model C is the least expensive phone. Since the retailer sold more Model B phones and fewer Model A phones, we need to know more information. If Model B phones were much more expensive than Model A phones, revenue might have increased. If Model A phones were much more expensive, revenue might have decreased.

Since Statement (1) is sufficient and Statement (2) is insufficient, the correct answer is choice (A).
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
let the cost of the model A,B,C be a,b,c
rise in the revenue = (175-190)a +(205-200)b +(220-210)c = -15a +5b+10c

St 1: a>b,c. if a=b=c the change in the revenue will be 0 but since it is not the case, the value ofor the expression will be negative. ANSWER

St 2: c<a,b. cannot be inferred anything with this information. INSUFFICIENT

Option A
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
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Re: The table above shows quantities of the mobile phone models sold by a [#permalink]
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