题目

 An international business specialist group has announced that the move towards a green economy is becoming more urgent for emerging economies(新兴经济体)，especially South Africa. On Monday，Innovation Group announced that green economic policies were becoming increasingly important on the global landscape and for emerging economies. According to Pule Mokoena，from Innovation Group，experts believe the adoption of these green policies will assist with“ailing(不景气的)economies”．“The move to a green economy，such as the adoption of alternative energy solutions，sho3．玻璃盒子里装有各色球12个，其中5红、4黑、2白、1绿，从中任取1球．记事件A为“取出1个红球”，事件B为“取出1个黑球”，事件C为“取出1个白球”，事件D为“取出1个绿球”．已知P（A）=$\frac{5}{12}$，P（B）=$\frac{1}{3}$，P（C）=$\frac{1}{6}$，P（D）=$\frac{1}{12}$．求：（1）“取出1球为红球或黑球”的概率；（2）“取出1球为红球或黑球或白球”的概率．