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A certain group of car dealerships agreed to donate x dollar [#permalink]

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21 Feb 2011, 00:36

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A certain group of car dealerships agreed to donate x dollars to a Red Cross Chapter for each car sold during a 30-day period.What was the total amount that was expected to be donated?

(1) A total of 500 cars were expected to be sold (2) Sixty more cars were sold than expected, so that the total amount actually donated was $28,000

a) as 500 are expected to be sold and x dollars are expected to be donated for each car => Expected donation will be 500x . sufficient

b) it is giving the actual amount donated but we need expected donation amount NS

Re: X dollars donated for each car sold to Red Cross [#permalink]

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21 Feb 2011, 00:46

GMATD11 wrote:

92)

a) as 500 are expected to be sold and x dollars are expected to be donated for each car => Expected donation will be 500x . sufficient

Whenever 500x is written; the exact value is not known. The question asks for exact dollar value.

Say; the dealership is donating $1 for every car they are expecting to sell; it would donate $500 Say; the dealership is donating $2 for every car they are expecting to sell; it would donate $1000

Thus Not sufficient.

b) it is giving the actual amount donated but we need expected donation amount NS True.

But this is wrong

Combing both; 500 car was expected to be sold; it actually sold 560 cars;

Donated; 28000 for 560 cars Donated per car; 28000/560 = $50

It was expecting to donate; 500*50=25000 Sufficient.

Re: X dollars donated for each car sold to Red Cross [#permalink]

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21 Feb 2011, 00:47

From statement 1, total expected donation is 500x, insufficient as we do not know x From Statement 2, if initial expectation was to sell N cars then (N+60)*x = 28000, we need to find amount expected to be donated which is N*x, but we cant determine that if we do not know x, so insufficient. Combining 1 and 2, we know N = 500, so, (560)*x = 28000 or x =28000/560 = 50 hence expected amount = 500*50 = 25000, Sufficient Answer C

92) A certain group of car dealerships agreed to donate x dollars to a Red Cross Chapter for each car sold during a 30-day period.What was the total amount that was expected to be donated?

a) A total of 500 cars were expected to be sold b) Sixty more cars were sold than expected, so that the total amount actually donated was $28,000

a) as 500 are expected to be sold and x dollars are expected to be donated for each car => Expected donation will be 500x . sufficient

b) it is giving the actual amount donated but we need expected donation amount NS

But this is wrong

Official Guide:

In data sufficiency problems that ask for the value of a quantity, the data given in the statements are sufficient only when it is possible to determine exactly one numerical value for the quantity.

Statement (1) gives us the expression with unknown (500x) rather than single numerical value for the quantity thus it's not sufficient.

A certain group of car dealerships agreed to donate x dollar [#permalink]

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11 Apr 2012, 12:36

A certain group of car dealerships agreed to donate x dollars to Red Cross chapter for each car sold during the 30 day period. what was the total amount that was expected to be donated?

(1) A total of 500 cars were expected to be sold (2) 60 more cars were sold than expected, so that the total amount actually donated was 28,000$

I came with E and was wrong My point was that the first statement doesn't tell us that the plan to sold 500 cars was established for the 30day period. Just in general to sell 500 cars Please - what can't i grasp here - could someone tell me?

Re: A certain group of car dealerships agreed to donate x dollar [#permalink]

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11 Apr 2012, 22:03

Guys i understand that the question is pretty simple ) but i used to think data can be sufficient only if it gives us necessary information I read the first statement as "500 cars will be sold in general, not during the month, within which the agreement took place". Otherwise it should be written " A total of 500 cars were expected to be sold within the 30 day period" Anyway, C is correct, and I must to go w it

Re: A certain group of car dealerships agreed to donate x dollar [#permalink]

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12 Apr 2012, 06:32

Galiya wrote:

A certain group of car dealerships agreed to donate x dollars to Red Cross chapter for each car sold during the 30 day period. what was the total amount that was expected to be donated?

(1) A total of 500 cars were expected to be sold (2) 60 more cars were sold than expected, so that the total amount actually donated was 28,000$

I came with E and was wrong My point was that the first statement doesn't tell us that the plan to sold 500 cars was established for the 30day period. Just in general to sell 500 cars Please - what can't i grasp here - could someone tell me?

Missed the key words Expected & Actual...

Went with E, but C is the correct answer
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Re: A certain group of car dealerships agreed to donate x dollar [#permalink]

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07 Dec 2017, 13:47

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