标题: 求助：GWD-9数学 [打印本页] 作者: ursula1102 时间: 2010-9-13 12:37 标题: 求助：GWD-9数学 Q23: When tossed, a certain coin has equal probability of landing on either side.If the coin is tossed 3 times, what is the probability that it will land on the same side each time?
A.1/8 B. 1/4 C. 1/3 D. 3/8 E.1/2 答案是 B,我觉得是A啊，C(3,3)乘以（1/2）的三次方 Q26: In the decimal representation of x, where 0 < x < 1, is the tenths digit if x nonzero? (1)16x is an integer. (2)8x is an integer.
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. 答案是B, 这题问什么呢？
Q26: In the decimal representation of x, where 0 < x < 1, is the tenths digit if x nonzero? (1)16x is an integer. (2)8x is an integer.
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. 答案是B, 这题问什么呢？