Question

设随机变量X服从二项分布B(2,p),已知P{X≥1}=5/9则p=______.具体过程怎么写啊,

Answer 1

P{X≥1}=5/9→P{X=0}=1-P{X≥1}=4/9

P{X=0}=1*p^0*(1-p)^2=4/9→p=1/3