निम्नलिखित का मान ज्ञात कीजिए-
(i) `""^(6)P_(4)` , (ii) `P(5,3)` , (iii) `P(6,6)`

Explanation

(i) `""^(6)P_(4)=(6!)/((6-4)!)= (6!)/(2!)=(6xx5xx4xx3xx2!)/(2!)`
`= 6xx5xx4xx3= 360`
(ii) `P(5,3)=""^(5)P_(3)=(5!)/((5-3)!)=(5!)/(2!)`
`=(5xx4xx3xx2!)/(2!) = 60`
(iii) `P(6,6)=""^(6)P_(6)=(6!)/((6-6)!)= (6!)/(0!) =(6!)/(1) = 720`