也可以是竞赛的数学题英文的
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也可以是竞赛的数学题
英文的
英文的
![也可以是竞赛的数学题英文的](/uploads/image/z/4790898-18-8.jpg?t=%E4%B9%9F%E5%8F%AF%E4%BB%A5%E6%98%AF%E7%AB%9E%E8%B5%9B%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%E8%8B%B1%E6%96%87%E7%9A%84)
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There are 9 workers in a community and 6 of them will be selected to be interviewed.How many combinations?
A container leaks 27% of the water in the first hour and leaks 23% of the remainder in the second hour.What percentage of the water that was leaked during the first two hours?
7 green balls and 5 red balls,seclet 3 balls randomly,what is the possibility of choosing 3 red ones?
There are 9 workers in a community and 6 of them will be selected to be interviewed.How many combinations?
A container leaks 27% of the water in the first hour and leaks 23% of the remainder in the second hour.What percentage of the water that was leaked during the first two hours?
7 green balls and 5 red balls,seclet 3 balls randomly,what is the possibility of choosing 3 red ones?