题库搜索>问题求解PS-17904
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The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax, or both?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
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把这个表格当作韦恩图，问题是“younger than 40, or supports a type of funding that indudes a tax, or both”占比多少？及问A U B的占比。在表中圈范围，圈出来，就是除了100意外的数字。所以占比=1-100/250=150/250=3/5
欢乐多
is younger than 40, 20+30+30=80 or supports a type of funding that indudes a tax, or both? 10+60=70 总数250， （80+70）/250=3/5
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2022-07-21 17:21:33
337024ygjon
or是并集的意思，要记住啊
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2021-09-29 22:29:22
Lori88
完全没有反应过来or是什么意思。原来就是 U 啊，用韦恩图就好了啊，哭死！！
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2021-08-22 00:38:03
236597re
8/25+12/25-5/25， U（ AUB）
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2020-07-14 12:56:14
412048id
这题没人错么？哪位大神解释一下啊？
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2020-06-01 12:01:45
如果有时间的话我也能做对回复 412048id
花了10分钟算了一堆数字都不像答案，因为问的是三种可能性相加相乘都没在答案里，备选只有3/5和4/5了，然后实在没办法了，看到框框里有个100，也不像答案，那就把这个100看成答案范围外的，答案范围就选3/5吧。这样都蒙错的话那我也没招了。
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2021-07-30 09:01:48
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问题求解PS
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213123
问题求解PS -17904
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17748
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17546
A language class has 155 students. 80 of them can speak English. 40 of them can speak Russian, 60 of them can speak French. There are 50 of them can speak exactly two languages, and 10can speak all three kind languages. What is the number of the student that can speak none of...
问题求解PS -15619
【OG20-P181-229题】Of the 150 houses in a certain development, 60 percent have air-conditioning, 50 percent have a sunporch, and 30 percent have a swimming pool. If 5 of the houses have all three of these amenities and 5 have none of them, how many of the houses haveexactly two of these amenities...
-18028
213123
问题求解PS -17904
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17748
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17546
A language class has 155 students. 80 of them can speak English. 40 of them can speak Russian, 60 of them can speak French. There are 50 of them can speak exactly two languages, and 10can speak all three kind languages. What is the number of the student that can speak none of...
问题求解PS -15619
【OG20-P181-229题】Of the 150 houses in a certain development, 60 percent have air-conditioning, 50 percent have a sunporch, and 30 percent have a swimming pool. If 5 of the houses have all three of these amenities and 5 have none of them, how many of the houses haveexactly two of these amenities...
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