The number of sequences in which 7 players can throw a ball, so that the youngest player may not be the last is -.	Choose the correct answer:
A) 4000
B) 2160
C) 4320
D) 5300
E) 4160
x Not younger_______ ↑   The last ball can be thrown by any of the remaining 6 players. The first 6 players can throw the ball in ⁶P₆ ways.   The required number of ways = 6(6!) = 4320   ANSWER:4320
<result>C</result>
The number of sequences in which 7 players can throw a ball, so that the youngest player may not be the last is -.