One quarter of the workers at the factory is clerical, one fifth is technical, half are administrative and the other 25 are managerial. How many workers total are there in the factory?	Select the correct option:
A) 250
B) 366
C) 400
D) 500
E) 2500
1/2x + 1/4x +1/5x = 19/20x   Remaining 1/20 x= 25   x= 25*20= 
<gadget id="calculator">25*20</gadget>
<output>500</output>
500   500 is the answer
<result>D</result>
One quarter of the workers at the factory is clerical, one fifth is technical, half are administrative and the other 25 are managerial. How many workers total are there in the factory?