Jawabanmu

2014-05-30T14:07:01+07:00
20/(50+20+18+12) = 20 / 100 = 1/50 ......
jawabannya 1/50
2014-05-30T14:08:28+07:00
Mat saja = 20 - 12 = 8
peluang suka mat saja = 8/50 = 4/25