Question

PERMUTATIONS ⤵️

1. Find n :

(1) 8Pn = 336

( 2 ) 4: "P2 = 5.n-1P3​

Answer 1

Answer:

336

The number of possible permutations of 8 objects taken 3 at a time is 336.

Explanation:

On the left, you have (n+1)P(3) = (n+1)(n)(n−1) and on the right, you have (n-1)P(2) = (n−1)(n−2). Then you have the equation: (n+1)(n)(n−1)=12(n−1)(n−2)...