If you have 5 New Year greeting cards and you want to send them to 2 of your friends, in how many ways can this be done?  Choose the correct option: A) 60 B) 20 C) 92 D) 67 E) None
Solution   We have to find number of permutations of 2 objects out of 5 objects. This number is 5P2=5(5-1)=5*4= 
<gadget id="calculator">5*4</gadget>
<output>20</output>
20   Answer 20
<result>B</result>
If you have 5 New Year greeting cards and you want to send them to 2 of your friends, in how many ways can this be done?