像下面的初中数学题，她会解吗？

1. A coin with a diameter of 6 is dropped on a floor that is a grid of 10 x 10 tiles. What is the probability that the entire coin is contained within one tile?

2. Andrew, Brian, and Chris all play for the same soccer team. Last season they scored a total of 21 goals between them, with each scoring at least one goal and no two scoring the same number of goals. How many distributions of goals scored by the three teammates are possible given these restrictions?

所有跟帖： 

• 五年级女儿不会,十年级儿子会。看样子她上九年级有困难. -一个人流浪到淡水- ♀ (0 bytes) () 04/30/2016 postreply 15:52:12