一个数学题目啊答:开箱时任意按一下三位数号码,分别有 000,001,002,003,010,011,012,013,020,021,022,023,030,031,032,033,100,101,102,103,110,111,112,113,120,121,122,123,130,131,132,133,200,201,202,203,210,211,212,213,220,221,222,223,230,231,232,233,300,301,302,303,310,311,312,...