Ответы и объяснения

2014-02-25T17:06:16+04:00
(3/4+1/6)*1/3+(5/6-1/2)*1/12=(11/12)*(1/3)+(1/3)*1/12=11/36+1/36=12/36=1/3
2014-02-25T17:09:53+04:00