→ penatnl:還有~我想問~多維度的牛頓法怎麼表示阿?? 03/12 01:27
1. a set of 200 people , consisting of 100 men and 100 women ,
is randomly divided into 100 pairs of 2 each
我想問的是 請問抽出一對是男女配的機率為何??
我直覺是100/199 可是答案說50/199 想不通
2.the male offspring of two carriers is not diseased , what is
the probability that he is a carrier ?
AA = not carrier , not diseased
aa = diseased and dies before it mates
Aa = carriers , not diseased
這題不是問假如爸媽都是Aa 那他Aa的機率是多少嗎??? 為什麼答案
P(Aa∣AA Aa) = 2/3
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