A team has to design a flag. The team two yellow strips of cloth and four green strips of cloth that they must use as is to make the flag. How many different flags can the team design with the materials at hand? Choose the correct choice from the following answers.
A) 15  B) 48  C) 240  D) 288  E) 720
The # of permutations of total 2+4= 
<gadget id="calculator">2+4</gadget>
<output>6</output>
6 strips where 2 are identical yellow and 4 are identical green is 6!/(2!*4!)=15 (note that they must use all the materials at hand, also I guess that the strips must be either only vertical or only horizontal).   15nswer: 15.
<result>A</result>
A team has to design a flag. The team two yellow strips of cloth and four green strips of cloth that they must use as is to make the flag. How many different flags can the team design with the materials at hand?