涛涛数学第七套 Q2,Q7,Q25,Q28

freebird1984 · 发表于 2009-11-9 22:42:34

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 of the 10 employees are women.

(2) The probability that both representatives selected will be men is less than .

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.

Q7:

√[2√63 + 2/(8+3√7)] =

A. 8 + 3√7

B. 4 + 3√7

C. 8

D. 4

E. √7

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.
B
C
D
E 1/(2R+3)

涛涛数学第七套 Q2,Q7,Q25,Q28

所属分类: GMAT考试

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