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Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels
Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels
admin
2011-01-18
34
问题
Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels." When you want to check your work, you can turn to the solutions at the end. If you aren’t familiar with some of the mathematical concepts, make a note to pay particular attention to that chapter in this book; this practice set covers a wide range of topics tested on the GMAT.
On all data sufficiency problems, the answer choices are the same (as you’ve learned). We’ve put them here for your reference.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Over a holiday weekend, a certain car dealer sold off 4 of the cars on its lot. If the cars sold for an average of $6,000 each, how many cars were on the dealer’s lot at the beginning of the weekend?
(1) The average value of the remaining cars on the lot is $5,000.
(2) The car dealer made $48,000 in car sales over the weekend.
选项
答案
B
解析
Given statement (1) alone, we only know average values of both the cars that were sold and the cars that remained; the dealer could have sold 4 cars and had 1 left, or sold 8 cars and had 2 left, or an infinite number of other options. So we can eliminate A and D.
With statement (2), we are able to find the number of cars sold by dividing the total sales by the average price. 48,000/6,000=8, so the dealer sold 8 cars. Since that is 4/5 of the cars on the lot, the dealer started off with 10 cars. Statement (2) is sufficient, so the answer is B.
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