Question

The cheerleading team lines up down the football field to rally the spectators. If there are 12 cheerleaders, which expression gives the number of ways can they line up down the field?
a.12C11 b. 2C12 c.12P1 d.12P12

Answer 1

\[_{?} a.)_{12}C_{1}
b.) _{12}C_{12}
c.)_{12}P_{1}
d.)_{12}p_{12}\]

Answer 2

if there are 2 cheerleaders,they can line up in 2 ways :AB and BA
if there are 3 cheerleaders they can line up in 6 ways :ABC,ACB,BCA,BAC,CAB,CBA
now 2=2!=2P1
6=6!=6P1
so if there are 'n' cheerleaders,there will be nP1 ways
so now can u tell me what if there are 12 cheerleaders??

Answer 3

c?

Answer 4

yup :) its 12P1