In a workshop there are 4 kinds of beds, 2 kinds of closets, 2 kinds of shelves and 7 kinds of chairs. In how many ways can a person decorate his room if he wants to buy in the workshop one shelf, one bed and one of the following: a chair or a closet?
Choose the correct answer.
A) 168.  B) 80.  C) 56.  D) 48.  E) 72.
ways to select one shelf = 2   ways to select one bed = 4   ways to select one of the following: a chair or a closet = 7+2= 
<gadget id="calculator">7+2</gadget>
<output>9</output>
9   ways to select all of them together= 2*4*9= 
<gadget id="calculator">2*4*9</gadget>
<output>72</output>
72   Hence, 72. is the answer.
<result>E</result>
In a workshop there are 4 kinds of beds, 2 kinds of closets, 2 kinds of shelves and 7 kinds of chairs. In how many ways can a person decorate his room if he wants to buy in the workshop one shelf, one bed and one of the following: a chair or a closet?