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标题: Two Questions [打印本页]

作者: EllenTony 时间: 2010-6-24 08:39
标题: Two Questions
If n is a positive integer, what is the remainder when 3⁸ⁿ⁺³ + 2 is divided by 5?

A.0
B.1
C.2
D.3
E.4

answer is B, Why?

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)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.
Answer: B

Thank you!!
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)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.
Answer: B

Thank you!!

作者: fdx3000 时间: 2010-6-24 10:41
第一题我觉得选E吧？你确定是B？我的思路38n+3的个位数是 7 然后加二这个数的各位数字就是9。与5有关的余数，只要看各位数字就可以了所以余数是4 不好意思啊第二题题目没有看懂！

作者: 勇者无疆 时间: 2010-6-24 10:48
顶楼上，第一题应该是E没错。

作者: EllenTony 时间: 2010-6-24 11:30
是和GWD-TN-24一起的30套里的数学题，第14套，答案会错吗？不好意思，第二道题没粘好。。估计是30号考试，有点心焦了，呵呵。。

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.
Answer: B

我感觉是E，但是答案是B。想不明白。。大家做GWD觉得答案都对吗？

考试之前，不急不躁，不急不躁，加油，加油！：）

作者: EllenTony 时间: 2010-6-24 11:33
3^8n+3个位是7啊？是不是很菜鸟的问题啊

作者: fdx3000 时间: 2010-6-24 11:57
3^8n+3的个位是3 9 7 1 四个循环啊~~~然后8n+3 被4除余数是3 就是3^8n+3的个位是7啊~~嘿嘿我1号考哦不急，拼了！

作者: fdx3000 时间: 2010-6-24 12:01
(1)More than of the 10 employees are women.
？？？？？？？？？？？

作者: EllenTony 时间: 2010-6-25 04:26
If 2 different representatives are to be selected at randomfrom a group of 10 employees and if p is the probability that bothrepresentatives selected will be women, is p > 1/2?
(1) More than 1/2 of the 10 employeesare women.
(2) The probability that bothrepresentatives selected will be men is less than 1/10.

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 NOTsufficient.

这回应该不会再错了吧。。

Thank you for your patience...

嗯，没错，拼了

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