If you have 8 New Year greeting cards and you want to send them to 6 of your friends, in how many ways can this be done?  Choose the most appropriate option:
A) 20160
B) 22100
C) 23000
D) 24500
E) None
Solution   We have to find number of permutations of 6 objects out of 8 objects. This number is 8P6=8(8-1)(8-2)(8-3)(8-4)(8-5)=8*7*6*5*4*3= 
<gadget id="calculator">8*7*6*5*4*3</gadget>
<output>20_160</output>
20160   20160nswer 20160
<result>A</result>
If you have 8 New Year greeting cards and you want to send them to 6 of your friends, in how many ways can this be done?