题目内容
甲、乙两篮球运动员在罚球线投球的命中率分别是0.7和0.6,每人投球3次,则两人都投进2球的概率是_______
0.19
【解析】.
甲:12,15,24,25,31,31,36,36,37,39,44,49,50;
乙:8,13,14,16,23,26,28,33,38,39,51.