讨论贴对不上号，只能求助大家了。我觉得这些题的答案好象有点问题。

Q2:

If 2 different representatives are to be selected at random from a group of 10 employees and if p is the probability that both representatives selected will be women, is p > 1/2

(1)
              More than 1/2 of the 10 employees are women.

(2)
              The probability that both representatives selected will be men is less than 1/10

答案是E，我的答案是B

Q22:

The number of defects in the first five cars to come through a new production line are 9, 7, 10, 4, and 6, respectively.  If the sixth car through the production line has either 3, 7, or 12 defects, for which of theses values does the mean number of defects per car for the first six cars equal the median?

I.                    3

II.                 7

III.               12

A.         I only

B.          II only

C.         III only

D.         I and III only

E.          I, II, and III

答案是D，我的答案是C

Q24:

On a map Town G is 10 centimeters due east of Town H and 8 centimeters due south of Town J.  Which of the following is closest to the straight-line distance, in centimeters, between Town H and Town J on the map?

A.     6

B.     13

C.     18

D.     20

E.      24

答案是B，我的答案是A

Q28:

This year Henry will save a certain amount of his income, and he will spend the rest.  Next year Henry will have no income, but for each dollar that he saves this year, he will have 1 + r dollars available to spend.  In terms of r, what fraction of his income should Henry save this year so that next year the amount he was available to spend will be equal to half the amount that he spends this year?

 

A。1/(r+2)

B.  1/(2r+2)

C 1/(3r+2)

D. 1/(r+3)

E. 1/(2r+3)

答案是E， 我算出来5个答案都不对

Q29:

Leo can buy a certain computer for p₁ dollars in State A, where the sales tax is t₁ percent, or he can buy the same computer for p₂ dollars in State B, where the sales tax is t₂ percent.  Is the total cost of the computer greater in State A than in State B?

(1)
                                      t₁ > t₂

(2)
                                      p₁t₁ > p₂t₂

_{答案是E， 我的答案是C}