抽0个次品的几率是0.99的5次方
抽1个次品的几率是,5*0.99*0.99*0.99*0.99*0.01
抽2个的几率是,C5~2*0.01²*0.99³
抽3个的几率是,C5~3*0.01³*o.99²
抽4个的几率是,5*0.01*0.01*0.01*0.01*0.09
抽5各的几率是,0.01的5次方
抽0个次品的几率是0.99的5次方
抽1个次品的几率是,5*0.99*0.99*0.99*0.99*0.01
抽2个的几率是,C5~2*0.01²*0.99³
抽3个的几率是,C5~3*0.01³*o.99²
抽4个的几率是,5*0.01*0.01*0.01*0.01*0.09
抽5各的几率是,0.01的5次方