r1=2
n=7
r1!/n!
There are 3360 ways.
362,880 ways
15
One... numbers
12
There are 3360 ways.
You can arrange and rearrange the word as many times as you like!There are 5040 different ways.
24 ways
362,880 ways
There are 30 ways.
15
One... numbers
24
12
60
10080
24 times