弱问gwd31上几道数学

毛毛花儿

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Q18:

On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip 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%

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Q23:

 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

Q25:

A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster.  If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?

 

A.     0

B.     1/9

C.     2/9

D.   1/3

E.      1

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Q31:

There are 8 magazines lying on a table; 4 are fashion magazines and the other 4 are sports magazines.  If 3 magazines are to be selected at random from the 8 magazines, what is the probability that at least one of the fashion magazines will be selected?

 

A.     1/2

B.     2/3

C.     32/35

D.     11/12

E.      13/14

Answer:

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Q32:

What is the remainder when the two digit, positive integer x is divided by 3?

(1)     The sum of the digits of x is 5.

(2)     The remainder when x is divided by 9 is 5.

                  

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.      

Q9:

What was the price at which a merchant sold a certain appliance?

(1)   The merchant’s gross profit on the appliance was 20 percent of the price at which the merchant sold the appliance.

(2)   The price at which the merchant sold the appliance was $50 more than the merchant’s cost of the appliance.

                  

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.

Answer:

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Q10:

An attorney charged a fee for estate planning services for a certain estate.  The attorney’s fee was what percent of the accessed value of the estate?

(1)     The accessed value of the estate was $1.2 million.

(2)     The attorney charged $2,400 for the estate planning services.

                  

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.

Answer:

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Q12:

There are 11 women and 9 men in a certain club.  If the club is to select a committee of 2 women and 2 men, how many different such committees are possible?

 

A.     120

B.     720

C.     1,060

D.     1,520

E.      1,980

Answer: