If a quality control check is made inspecting a sample of 2 light bulbs from a box of 10 lighbulbs, how many different samples can be chosen?	Choose the correct choice:
A) 6	B) 24	C) 45	D) 66	E) 72
Try using the formula for combinations:   n!/r!(n-r)!   10!/2!(10-2)!   10!/2!*8!    10*9/2*1= 
<gadget id="calculator"> 10*9/2*1</gadget>
<output>45</output>
45   45
<result>C</result>
If a quality control check is made inspecting a sample of 2 light bulbs from a box of 10 lighbulbs, how many different samples can be chosen?