Respostas

2014-05-10T14:24:50-03:00
P(1b,2p)=p(bpp)+p(pbp)+p(ppb)= 5/7·6/9·4/8+ 2/7·3/9·4/8 + 2/7·6/9·4/8= 5/7·6/9·1/2+ 2/7·3/9·1/2 + 2/7·6/9·1/2= 48/126= 8/21~0,3809...