9000139703

SubArea: 
Combinatorics
Level: 
A
Project ID: 
9000139703
Source Problem: 
2010007002
Accepted: 
1
Clonable: 
1
Easy: 
0
The box contains 5 red crayons, 4 yellow crayons and 2 green crayons. The crayons are removed from the box and arranged in a line. How many different color patterns can be obtained by this procedure?
11!5!4!2!=6930
5⋅4⋅2=40
5!4!2!=5760
(5!4!)2=8294400