帮忙解决GWD数学疑问，谢谢

麦兜woo

1.When positive integer x is divided by positive integer y, the remainder is 9.  If x/y = 96.12, what is the value of y?
A. 96

B. 75

C. 48

D. 25

E. 12
答案选B
2.On a certain transatlantic crossing, 20 percent of a ship’s passengers held roundtrip tickets and also took their cars abroad the ship.  If 60 percent of the passengers with round
trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?
A. 33 1/3%

B. 40%

C. 50%

D. 60%

E. 66 2/3%
答案选C

3. AMOUNT OF BACTERIA PRESENT

Time	Amount
1:00 P.M.	10.0 grams
4:00 P.M.	x grams
7:00 P.M.	14.4 grams

Data for a certain biology experiment are given in the table above.  If the amount of bacteria present increased by the same fraction during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M.?
A. 12.0

B. 12.1

C. 12.2

D. 12.3

E. 12.4
我算出来是C，可答案是A，为什么？

4.What is the median number of employees assigned per project for the projects at Company Z?

(1)25 percent of the projects at Company Z have 4 or more employees assigned to each project.

(2) 35 percent of the projects at Company Z have 2 or fewer employees assigned to each project.
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.
答案选C，求解释