Question

求：一个关于英语数学题的翻译！

There are 7 red marbles, 5 green marbles, and 6 blue marbles is a jar. What is the minimum number of marbles to choose, without replacement, to guarantee that there is one of each color marble.
It is possible to get all 7 red marbles, then all 6 blue marbles, and then a green marble. You must choose a minimum of 7+6+1=14 marbles to guarantee that you have one of each color marble.

Answer 1

一个瓶子里有7块红宝石，5块绿宝石和6块蓝宝石。假设从瓶子里取出后不放回，当最少取出多少个宝石时，才能保证每种颜色各有一块?

最极端的一种可能是你先取出了7块红宝石，之后又取出了6块蓝宝石，之后才取出了绿宝石，所以你最少应该取7+6+1=14块宝石，才能保证你每种颜色各有了一块。

希望能帮到你