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21 Feb 2011, 01:36
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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
(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
But this is wrong
sufficient
b) it is giving the actual amount donated but we need expected donation amount NS
But this is wrong
21 Feb 2011, 01:46
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GMATD11
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
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.
Ans: "C"
21 Feb 2011, 01:47
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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
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
expected cars + 60 cars) x donation per car = 28000
