[計量] 求一題 GWD數學感謝
第八回
Q9:
If an integer n is to be chosen at random from the integers 1 to 96,
, inclusive, what is the probability that n(n + 1)(n + 2)
will be divisible by 8?
小弟數學不怎好我怎麼算都是 1/2 可是答案都不是這個 麻煩會的人一下 感謝!ANS: 5/8
Q13:
Company S produces two kinds of stereos: basic and deluxe. Of the stereos
produced by Company S last month, 2/3 were basic and the rest were deluxe.
If it takes 5/7 as many hours to produce a deluxe stereo as it does to
produce a basic stereo ,then the number of hours it took to produce the deluxe
stereos last month was what fraction of the total number of hours it took to
produce all the stereos?
我算出來是1/3 可是答案也是錯的 不知道是不是我理解有問題 感謝 ANS:7/17
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