We have 10 people and 3 chairs. In how many ways chairs can be occupy? Choices.
A) 650 B) 720 C) 810 D) 790 E) 915
no. of ways they can be occupy = 10*9*8= 
<gadget id="calculator">10*9*8</gadget>
<output>720</output>
720   Answer is 720
<result>B</result>
We have 10 people and 3 chairs. In how many ways chairs can be occupy?