Prep-T1-Q38 Q62 Q175 (PS)

[oneseven]

Q38
Three grades of milk are 1 percent, 2 percent, and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x+y+z gallons of a 1.5 percent grade, what is x in terms of y and z?

A. y+3z
B. (y+z)/4
C. 2y+3z
D. 3y+z
E. 3y+4.5z

Answer: A

Q62
Alice's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month. The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save. If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?

A. 1/2
B. 1/3
C. 1/4
D. 1/5
E. 1/6

Answer: D

Q175
Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?

A. 50+I/200
B. 50+3I/100
C. 50+I/40
D. 100+I/50
E. 100+3I/100

Answer : C

我好像很不擅長看這種落落長的題目
每次看到最後都不知道它在說啥
請教大家...

[Huang Hsin-Yi]

Q38 total fat / total gallon=1.5%

therefore 0.01x+0.02y+0.03z/x+y+z=1.5%

you can get X=y+3z


ps175

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