there is four different color cloth strip.how many different flag you can make using these strip?if you want to to make multicolour flag then you must use different strip horizontally.  Choose the correct choice from the following answers.
A) 50  B) 64  C) 48  D) 120  E) 24
total no.of flag using all four strip=4P4=4!=24   total no. of flag using three strip=4P3=4!/1!=24   total no. of flag using two strip=4P2=4!/2!=12   total no. of flag using one strip=4P1=4!/3!=4   total no. of flag=24+24+12+4= 
<gadget id="calculator">24+24+12+4</gadget>
<output>64</output>
64   answer 64
<result>B</result>
there is four different color cloth strip.how many different flag you can make using these strip?if you want to to make multicolour flag then you must use different strip horizontally.