Hi,
could someone please help solving these 3 questions from an old published GMAT Test?
Q.1: Last year Department Store X had a sales total for December that was 4 times the average (arithmetic mean) of the monthly sales totals for January through November. The sales total for December was what fraction of the sales total for the year?
A. 1/4
B. 4/15
C.1/3
D. 4/11
E. 4/5
Correct B.
Q.2: Working alone, printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 15, and 18 hours, respectively. What is the ratio of the time it takes printer X to do the job, working alone at its rate, to the time it takes printers Y and Z to do the job, working together at their individual rates?
A. 4/11
B. 1/2
C. 15/22
D. 22/15
E. 23/270
Correct D.
Comment: I know there are already a couple work and rate related topics posted, but this one doesn't seem to work with the usual formula...(at least not with me)
Q.3: In 1985 a company sold a brand of shoes to retailers for a fixed price per pair. In 1986 the number of pairs of the shoes that the company sold to retailers decreased by 20 percent, while the price per pair increased by 20 percent. If the company's revenue from the sale of the shoes in 1986 was $3.0 million, what was the approximate revenue from the sale of the shoes in 1985?
A. 1.3 million
B. 1.9 million
C. 2.4 million
D. 3.1 million
E. 3.6 million
Correct D.
Comment: I've tried two different (both obviously wrong) approaches and got 1.9 million and 3.6 million but not the correct answer :S
Thank you for your help in advance,
E.
could someone please help solving these 3 questions from an old published GMAT Test?
Q.1: Last year Department Store X had a sales total for December that was 4 times the average (arithmetic mean) of the monthly sales totals for January through November. The sales total for December was what fraction of the sales total for the year?
A. 1/4
B. 4/15
C.1/3
D. 4/11
E. 4/5
Correct B.
Q.2: Working alone, printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 15, and 18 hours, respectively. What is the ratio of the time it takes printer X to do the job, working alone at its rate, to the time it takes printers Y and Z to do the job, working together at their individual rates?
A. 4/11
B. 1/2
C. 15/22
D. 22/15
E. 23/270
Correct D.
Comment: I know there are already a couple work and rate related topics posted, but this one doesn't seem to work with the usual formula...(at least not with me)
Q.3: In 1985 a company sold a brand of shoes to retailers for a fixed price per pair. In 1986 the number of pairs of the shoes that the company sold to retailers decreased by 20 percent, while the price per pair increased by 20 percent. If the company's revenue from the sale of the shoes in 1986 was $3.0 million, what was the approximate revenue from the sale of the shoes in 1985?
A. 1.3 million
B. 1.9 million
C. 2.4 million
D. 3.1 million
E. 3.6 million
Correct D.
Comment: I've tried two different (both obviously wrong) approaches and got 1.9 million and 3.6 million but not the correct answer :S
Thank you for your help in advance,
E.
