1. 1) 5/(5+3+4)=5/12=0,41666...
2) 3/(5+3+4)=3/12=0,25
3) 4/(5+3+4)=4/12=0,3333...
4) (5+3)/(5+3+4)=8/12=0,666...
5) (5+4)/(5+3+4)=9/12=0,75
6) (3+4)/(5+3+4)=7/12=0,58333..
2. (3/(6+3))*(8/(7+8))=8/45=0,1777...
3. 0,8*(1-0,6)+0,6*(1-0,8)=0,8*0,4+0,6*0,2=0,32+0,12=0,44
4. (12/(12+18))*(11/(11+18))=12/30*11/29=0,151724..