Re: [計量] 請教2題計量問題
※ 引述《kk21 (努力中)》之銘言：
: 各位好:
: 煩請高手撥空解答，問題如下:
: (1) Of the 7 members of the city concil, 4 are Democrats and 3 are
: Republicans. T is the total number of different 3-person committees
: that can be appointed from the council membership such that each
: committee consists of 2 Democrates and 1 Republican.
有個七人組成的市議會，4個是D黨，3個是R黨。T是一個由三個人組成的委員會
其中兩人必須從D黨一個從R黨的數量(就是這樣的組合有幾種可能)。
T = C(4,2)*C(3,1)>15
: Question: T 15
: Answer: A
: 可否連題意一併解釋? 這題我連題目都看不懂.....
: (2) A positive integer with exactly two different divisors greater than 1
: must be
一個正整數有恰好兩個大於一且不相等的因數會是?
: (A) a prime
: (B) an even integer
: (C) a multiple of 3
: (D) the square of a prime
: (E) the square of an odd integer
: Answer: D
: 謝謝~~
我選不出答案來...是我傻了嗎?
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