ๅป็่
ใฎใขใซใฆใณใใฎๆนใซใไผใใใใใใจใใใใพใใใ็ฎ้ใใใใ ใใใฐๅนธใใงใใ
้ฃๆใ็ญใใชใใใใซๆฉ้ๆฌ้กใซๅ
ฅใใใฆใใใ ใใพใใไปฐใใใใซใ่บซๅใๅไนใฃใฆใใๆๅฉๆดปๅใซๅ
ฅใใจใใใใจใฏ็ขบใใซBLSใฎๆ้ ใซใฏใใใพใใใ
1/n