We have 7 people and 4 chairs. In how many ways chairs can be occupy?	Choices
A) 840 B) 720 C) 650 D) 914 E) 796
no. of ways they can be occupy = 7*6*5*4= 
<gadget id="calculator">7*6*5*4</gadget>
<output>840</output>
840   840nswer is 840
<result>A</result>
We have 7 people and 4 chairs. In how many ways chairs can be occupy?